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Sexual Reproduction 6.2. Pollination In most _______, internal fertilization is achieved through a process called ___________. Pollination is the transfer.

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Presentation on theme: "Sexual Reproduction 6.2. Pollination In most _______, internal fertilization is achieved through a process called ___________. Pollination is the transfer."— Presentation transcript:

1 Sexual Reproduction 6.2

2 Pollination In most _______, internal fertilization is achieved through a process called ___________. Pollination is the transfer of male __________ in structures called ________ from the male reproductive part of the plant to the female reproductive part of the plant. Pollen _______ carry the sperm cells in a protective case to the ________, which are the female plant structures that contain the egg cells. The reproductive organ of the male is the ________. The reproductive organ of the female is the ________.

3 Sexual Reproduction 6.2 Pollination In most plants, internal fertilization is achieved through a process called ___________. Pollination is the transfer of male __________ in structures called ________ from the male reproductive part of the plant to the female reproductive part of the plant. Pollen _______ carry the sperm cells in a protective case to the ________, which are the female plant structures that contain the egg cells. The reproductive organ of the male is the ________. The reproductive organ of the female is the ________.

4 Sexual Reproduction 6.2 Pollination In most plants, internal fertilization is achieved through a process called pollination. Pollination is the transfer of male __________ in structures called ________ from the male reproductive part of the plant to the female reproductive part of the plant. Pollen _______ carry the sperm cells in a protective case to the ________, which are the female plant structures that contain the egg cells. The reproductive organ of the male is the ________. The reproductive organ of the female is the ________.

5 Sexual Reproduction 6.2 Pollination In most plants, internal fertilization is achieved through a process called pollination. Pollination is the transfer of male gametes in structures called ________ from the male reproductive part of the plant to the female reproductive part of the plant. Pollen _______ carry the sperm cells in a protective case to the ________, which are the female plant structures that contain the egg cells. The reproductive organ of the male is the ________. The reproductive organ of the female is the ________.

6 Sexual Reproduction 6.2 Pollination In most plants, internal fertilization is achieved through a process called pollination. Pollination is the transfer of male gametes in structures called pollen from the male reproductive part of the plant to the female reproductive part of the plant. Pollen _______ carry the sperm cells in a protective case to the ________, which are the female plant structures that contain the egg cells. The reproductive organ of the male is the ________. The reproductive organ of the female is the ________.

7 Sexual Reproduction 6.2 Pollination In most plants, internal fertilization is achieved through a process called pollination. Pollination is the transfer of male gametes in structures called pollen from the male reproductive part of the plant to the female reproductive part of the plant. Pollen grains carry the sperm cells in a protective case to the ________, which are the female plant structures that contain the egg cells. The reproductive organ of the male is the ________. The reproductive organ of the female is the ________.

8 Sexual Reproduction 6.2 Pollination In most plants, internal fertilization is achieved through a process called pollination. Pollination is the transfer of male gametes in structures called pollen from the male reproductive part of the plant to the female reproductive part of the plant. Pollen grains carry the sperm cells in a protective case to the ovules, which are the female plant structures that contain the egg cells. The reproductive organ of the male is the ________. The reproductive organ of the female is the ________.

9 Sexual Reproduction 6.2 Pollination In most plants, internal fertilization is achieved through a process called pollination. Pollination is the transfer of male gametes in structures called pollen from the male reproductive part of the plant to the female reproductive part of the plant. Pollen grains carry the sperm cells in a protective case to the ovules, which are the female plant structures that contain the egg cells. The reproductive organ of the male is the stamen. The reproductive organ of the female is the ________.

10 Sexual Reproduction 6.2 Pollination In most plants, internal fertilization is achieved through a process called pollination. Pollination is the transfer of male gametes in structures called pollen from the male reproductive part of the plant to the female reproductive part of the plant. Pollen grains carry the sperm cells in a protective case to the ovules, which are the female plant structures that contain the egg cells. The reproductive organ of the male is the stamen. The reproductive organ of the female is the pistil.

11 Sexual Reproduction 6.2 Pollination After the pollen lands on the female part of the plant, a pollen _____ forms, which is a structure that _________ the sperm cells to the egg cells. Following fertilization, a ________ grows into an embryo and is nourished by food stored within the ______ in which the embryo grows. The seed’s tough ______ coating protects the developing embryo. Often _____ transfer pollen from one plant to another when they are collecting sugars (________) from the flowers.

12 Sexual Reproduction 6.2 Pollination After the pollen lands on the female part of the plant, a pollen tube forms, which is a structure that _________ the sperm cells to the egg cells. Following fertilization, a ________ grows into an embryo and is nourished by food stored within the ______ in which the embryo grows. The seed’s tough ______ coating protects the developing embryo. Often _____ transfer pollen from one plant to another when they are collecting sugars (________) from the flowers.

13 Sexual Reproduction 6.2 Pollination After the pollen lands on the female part of the plant, a pollen tube forms, which is a structure that delivers the sperm cells to the egg cells. Following fertilization, a ________ grows into an embryo and is nourished by food stored within the ______ in which the embryo grows. The seed’s tough ______ coating protects the developing embryo. Often _____ transfer pollen from one plant to another when they are collecting sugars (________) from the flowers.

14 Sexual Reproduction 6.2 Pollination After the pollen lands on the female part of the plant, a pollen tube forms, which is a structure that delivers the sperm cells to the egg cells. Following fertilization, a zygote grows into an embryo and is nourished by food stored within the ______ in which the embryo grows. The seed’s tough ______ coating protects the developing embryo. Often _____ transfer pollen from one plant to another when they are collecting sugars (________) from the flowers.

15 Sexual Reproduction 6.2 Pollination After the pollen lands on the female part of the plant, a pollen tube forms, which is a structure that delivers the sperm cells to the egg cells. Following fertilization, a zygote grows into an embryo and is nourished by food stored within the seed in which the embryo grows. The seed’s tough ______ coating protects the developing embryo. Often _____ transfer pollen from one plant to another when they are collecting sugars (________) from the flowers.

16 Sexual Reproduction 6.2 Pollination After the pollen lands on the female part of the plant, a pollen tube forms, which is a structure that delivers the sperm cells to the egg cells. Following fertilization, a zygote grows into an embryo and is nourished by food stored within the seed in which the embryo grows. The seed’s tough outer coating protects the developing embryo. Often _____ transfer pollen from one plant to another when they are collecting sugars (________) from the flowers.

17 Sexual Reproduction 6.2 Pollination After the pollen lands on the female part of the plant, a pollen tube forms, which is a structure that delivers the sperm cells to the egg cells. Following fertilization, a zygote grows into an embryo and is nourished by food stored within the seed in which the embryo grows. The seed’s tough outer coating protects the developing embryo. Often bees transfer pollen from one plant to another when they are collecting sugars (________) from the flowers.

18 Sexual Reproduction 6.2 Pollination After the pollen lands on the female part of the plant, a pollen tube forms, which is a structure that delivers the sperm cells to the egg cells. Following fertilization, a zygote grows into an embryo and is nourished by food stored within the seed in which the embryo grows. The seed’s tough outer coating protects the developing embryo. Often bees transfer pollen from one plant to another when they are collecting sugars (nectar) from the flowers.

19 Sexual Reproduction 6.2 Pollination After the pollen lands on the female part of the plant, a pollen tube forms, which is a structure that delivers the sperm cells to the egg cells. Following fertilization, a zygote grows into an embryo and is nourished by food stored within the seed in which the embryo grows. The seed’s tough outer coating protects the developing embryo. Often bees transfer pollen from one plant to another when they are collecting sugars (nectar) from the flowers.

20 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their ________ to the their female counterpart. Many plants produce ______ which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not _________ by animals. As a result the embryo may survive, grow, and reproduce ______ from the parent. Pine and fir trees produce ______. Pollen is releases from the male cones and is carried by the _____ to the female cones. The embryo is protected within ______ in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the _______, _______, and small _________ to new locations.

21 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce ______ which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not _________ by animals. As a result the embryo may survive, grow, and reproduce ______ from the parent. Pine and fir trees produce ______. Pollen is releases from the male cones and is carried by the _____ to the female cones. The embryo is protected within ______ in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the _______, _______, and small _________ to new locations.

22 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not _________ by animals. As a result the embryo may survive, grow, and reproduce ______ from the parent. Pine and fir trees produce ______. Pollen is releases from the male cones and is carried by the _____ to the female cones. The embryo is protected within ______ in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the _______, _______, and small _________ to new locations.

23 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not digested by animals. As a result the embryo may survive, grow, and reproduce ______ from the parent. Pine and fir trees produce ______. Pollen is releases from the male cones and is carried by the _____ to the female cones. The embryo is protected within ______ in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the _______, _______, and small _________ to new locations.

24 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not digested by animals. As a result the embryo may survive, grow, and reproduce away from the parent. Pine and fir trees produce ______. Pollen is releases from the male cones and is carried by the _____ to the female cones. The embryo is protected within ______ in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the _______, _______, and small _________ to new locations.

25 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not digested by animals. As a result the embryo may survive, grow, and reproduce away from the parent. Pine and fir trees produce cones. Pollen is releases from the male cones and is carried by the _____ to the female cones. The embryo is protected within ______ in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the _______, _______, and small _________ to new locations.

26 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not digested by animals. As a result the embryo may survive, grow, and reproduce away from the parent. Pine and fir trees produce cones. Pollen is releases from the male cones and is carried by the wind to the female cones. The embryo is protected within ______ in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the _______, _______, and small _________ to new locations.

27 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not digested by animals. As a result the embryo may survive, grow, and reproduce away from the parent. Pine and fir trees produce cones. Pollen is releases from the male cones and is carried by the wind to the female cones. The embryo is protected within seeds in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the _______, _______, and small _________ to new locations.

28 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not digested by animals. As a result the embryo may survive, grow, and reproduce away from the parent. Pine and fir trees produce cones. Pollen is releases from the male cones and is carried by the wind to the female cones. The embryo is protected within seeds in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the wind, _______, and small _________ to new locations.

29 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not digested by animals. As a result the embryo may survive, grow, and reproduce away from the parent. Pine and fir trees produce cones. Pollen is releases from the male cones and is carried by the wind to the female cones. The embryo is protected within seeds in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the wind, birds, and small _________ to new locations.

30 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not digested by animals. As a result the embryo may survive, grow, and reproduce away from the parent. Pine and fir trees produce cones. Pollen is releases from the male cones and is carried by the wind to the female cones. The embryo is protected within seeds in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the wind, birds, and small animals to new locations.

31 Sexual Reproduction 6.2 Pollen Transport Many plants rely on other ways to transport their pollen to the their female counterpart. Many plants produce fruit which contain seeds, animals eat these fruits and inadvertently transport the seed to a new location. Since many seeds have a tough outer coat, they are often not digested by animals. As a result the embryo may survive, grow, and reproduce away from the parent. Pine and fir trees produce cones. Pollen is releases from the male cones and is carried by the wind to the female cones. The embryo is protected within seeds in the female cone and completes its development there. The winged seeds that are eventually released are often transported by the wind, birds, and small animals to new locations.

32 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first ____ months after fertilization. After fertilization, the fertilized egg, or ________, begins the process of ________ and undergoes a series of rapid cell _________. By the end of the first week, the zygote divides many times to form a _____ of cells. At this stage, the ball of cells is about ___ mm in diameter and is called a _______. The next stage of development occurs at the end of the second week when a ________ ball of cells forms, which is called a __________. The blastula is about ____ mm in diameter.

33 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or ________, begins the process of ________ and undergoes a series of rapid cell _________. By the end of the first week, the zygote divides many times to form a _____ of cells. At this stage, the ball of cells is about ___ mm in diameter and is called a _______. The next stage of development occurs at the end of the second week when a ________ ball of cells forms, which is called a __________. The blastula is about ____ mm in diameter.

34 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or zygote, begins the process of ________ and undergoes a series of rapid cell _________. By the end of the first week, the zygote divides many times to form a _____ of cells. At this stage, the ball of cells is about ___ mm in diameter and is called a _______. The next stage of development occurs at the end of the second week when a ________ ball of cells forms, which is called a __________. The blastula is about ____ mm in diameter.

35 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or zygote, begins the process of mitosis and undergoes a series of rapid cell _________. By the end of the first week, the zygote divides many times to form a _____ of cells. At this stage, the ball of cells is about ___ mm in diameter and is called a _______. The next stage of development occurs at the end of the second week when a ________ ball of cells forms, which is called a __________. The blastula is about ____ mm in diameter.

36 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or zygote, begins the process of mitosis and undergoes a series of rapid cell divisions. By the end of the first week, the zygote divides many times to form a _____ of cells. At this stage, the ball of cells is about ___ mm in diameter and is called a _______. The next stage of development occurs at the end of the second week when a ________ ball of cells forms, which is called a __________. The blastula is about ____ mm in diameter.

37 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or zygote, begins the process of mitosis and undergoes a series of rapid cell divisions. By the end of the first week, the zygote divides many times to form a ball of cells. At this stage, the ball of cells is about ___ mm in diameter and is called a _______. The next stage of development occurs at the end of the second week when a ________ ball of cells forms, which is called a __________. The blastula is about ____ mm in diameter.

38 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or zygote, begins the process of mitosis and undergoes a series of rapid cell divisions. By the end of the first week, the zygote divides many times to form a ball of cells. At this stage, the ball of cells is about 0.2 mm in diameter and is called a _______. The next stage of development occurs at the end of the second week when a ________ ball of cells forms, which is called a __________. The blastula is about ____ mm in diameter.

39 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or zygote, begins the process of mitosis and undergoes a series of rapid cell divisions. By the end of the first week, the zygote divides many times to form a ball of cells. At this stage, the ball of cells is about 0.2 mm in diameter and is called a morula. The next stage of development occurs at the end of the second week when a ________ ball of cells forms, which is called a __________. The blastula is about ____ mm in diameter.

40 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or zygote, begins the process of mitosis and undergoes a series of rapid cell divisions. By the end of the first week, the zygote divides many times to form a ball of cells. At this stage, the ball of cells is about 0.2 mm in diameter and is called a morula. The next stage of development occurs at the end of the second week when a hollow ball of cells forms, which is called a __________. The blastula is about ____ mm in diameter.

41 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or zygote, begins the process of mitosis and undergoes a series of rapid cell divisions. By the end of the first week, the zygote divides many times to form a ball of cells. At this stage, the ball of cells is about 0.2 mm in diameter and is called a morula. The next stage of development occurs at the end of the second week when a hollow ball of cells forms, which is called a blastula. The blastula is about ____ mm in diameter.

42 Sexual Reproduction 6.2 Embryonic Development The early development of an organism is called embryonic development. In humans, embryonic development takes place in the first two months after fertilization. After fertilization, the fertilized egg, or zygote, begins the process of mitosis and undergoes a series of rapid cell divisions. By the end of the first week, the zygote divides many times to form a ball of cells. At this stage, the ball of cells is about 0.2 mm in diameter and is called a morula. The next stage of development occurs at the end of the second week when a hollow ball of cells forms, which is called a blastula. The blastula is about 1.5 mm in diameter.

43 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic ______ cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into __ layers. At this stage, the developing embryo is called the _________. The outside layer of the gastrula is called the _________. Cells in this layer will eventually form ______ and the _________ system. The middle layer is called the __________ and will form the ________, muscles, blood vessels, ___________ organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

44 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into __ layers. At this stage, the developing embryo is called the _________. The outside layer of the gastrula is called the _________. Cells in this layer will eventually form ______ and the _________ system. The middle layer is called the __________ and will form the ________, muscles, blood vessels, ___________ organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

45 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the _________. The outside layer of the gastrula is called the _________. Cells in this layer will eventually form ______ and the _________ system. The middle layer is called the __________ and will form the ________, muscles, blood vessels, ___________ organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

46 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the _________. Cells in this layer will eventually form ______ and the _________ system. The middle layer is called the __________ and will form the ________, muscles, blood vessels, ___________ organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

47 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form ______ and the _________ system. The middle layer is called the __________ and will form the ________, muscles, blood vessels, ___________ organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

48 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form skin and the _________ system. The middle layer is called the __________ and will form the ________, muscles, blood vessels, ___________ organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

49 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form skin and the nervous system. The middle layer is called the __________ and will form the ________, muscles, blood vessels, ___________ organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

50 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form skin and the nervous system. The middle layer is called the mesoderm and will form the ________, muscles, blood vessels, ___________ organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

51 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form skin and the nervous system. The middle layer is called the mesoderm and will form the kidneys, muscles, blood vessels, ___________ organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

52 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form skin and the nervous system. The middle layer is called the mesoderm and will form the kidneys, muscles, blood vessels, reproductive organs, and bones. The inner layer is called the __________ and will form the ______, liver, and the lining of the _________ system.

53 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form skin and the nervous system. The middle layer is called the mesoderm and will form the kidneys, muscles, blood vessels, reproductive organs, and bones. The inner layer is called the endoderm and will form the ______, liver, and the lining of the _________ system.

54 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form skin and the nervous system. The middle layer is called the mesoderm and will form the kidneys, muscles, blood vessels, reproductive organs, and bones. The inner layer is called the endoderm and will form the lungs, liver, and the lining of the _________ system.

55 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form skin and the nervous system. The middle layer is called the mesoderm and will form the kidneys, muscles, blood vessels, reproductive organs, and bones. The inner layer is called the endoderm and will form the lungs, liver, and the lining of the digestive system.

56 Sexual Reproduction 6.2 Embryonic Development At this point, the cells are known as embryonic stem cells (cells that can develop into any type of cell). The cells of the blastula organize themselves into 3 layers. At this stage, the developing embryo is called the gastrula. The outside layer of the gastrula is called the ectoderm. Cells in this layer will eventually form skin and the nervous system. The middle layer is called the mesoderm and will form the kidneys, muscles, blood vessels, reproductive organs, and bones. The inner layer is called the endoderm and will form the lungs, liver, and the lining of the digestive system.

57 Sexual Reproduction 6.2 Fetal Development The three layers of the gastrula will eventually form the organs and tissues of a human ______. This process is called ___________, which continues for a period of ___ weeks. Differentiation is often divided into three periods of time called __________. Each trimester is approximately ______ months long, and major developmental changes occur in each trimester.

58 Sexual Reproduction 6.2 Fetal Development The three layers of the gastrula will eventually form the organs and tissues of a human baby. This process is called ___________, which continues for a period of ___ weeks. Differentiation is often divided into three periods of time called __________. Each trimester is approximately ______ months long, and major developmental changes occur in each trimester.

59 Sexual Reproduction 6.2 Fetal Development The three layers of the gastrula will eventually form the organs and tissues of a human baby. This process is called differentiation, which continues for a period of ___ weeks. Differentiation is often divided into three periods of time called __________. Each trimester is approximately ______ months long, and major developmental changes occur in each trimester.

60 Sexual Reproduction 6.2 Fetal Development The three layers of the gastrula will eventually form the organs and tissues of a human baby. This process is called differentiation, which continues for a period of 38 weeks. Differentiation is often divided into three periods of time called __________. Each trimester is approximately ______ months long, and major developmental changes occur in each trimester.

61 Sexual Reproduction 6.2 Fetal Development The three layers of the gastrula will eventually form the organs and tissues of a human baby. This process is called differentiation, which continues for a period of 38 weeks. Differentiation is often divided into three periods of time called trimesters. Each trimester is approximately ______ months long, and major developmental changes occur in each trimester.

62 Sexual Reproduction 6.2 Fetal Development The three layers of the gastrula will eventually form the organs and tissues of a human baby. This process is called differentiation, which continues for a period of 38 weeks. Differentiation is often divided into three periods of time called trimesters. Each trimester is approximately three months long, and major developmental changes occur in each trimester.

63 Sexual Reproduction 6.2 First Trimester: Developing Organ Systems During the first trimester, all the ______ systems begin to develop and form. At four weeks, the _______ and ________ _____ are developing. By eight weeks, bone cells are forming, and the embryo is called a ______. By 12 weeks in fetal development, the organ systems have formed. On average, at the end of the first trimester, the fetus is about ____ grams and about ___ cm long.

64 Sexual Reproduction 6.2 First Trimester: Developing Organ Systems During the first trimester, all the organ systems begin to develop and form. At four weeks, the _______ and ________ _____ are developing. By eight weeks, bone cells are forming, and the embryo is called a ______. By 12 weeks in fetal development, the organ systems have formed. On average, at the end of the first trimester, the fetus is about ____ grams and about ___ cm long.

65 Sexual Reproduction 6.2 First Trimester: Developing Organ Systems During the first trimester, all the organ systems begin to develop and form. At four weeks, the brain and ________ _____ are developing. By eight weeks, bone cells are forming, and the embryo is called a ______. By 12 weeks in fetal development, the organ systems have formed. On average, at the end of the first trimester, the fetus is about ____ grams and about ___ cm long.

66 Sexual Reproduction 6.2 First Trimester: Developing Organ Systems During the first trimester, all the organ systems begin to develop and form. At four weeks, the brain and spinal cord are developing. By eight weeks, bone cells are forming, and the embryo is called a ______. By 12 weeks in fetal development, the organ systems have formed. On average, at the end of the first trimester, the fetus is about ____ grams and about ___ cm long.

67 Sexual Reproduction 6.2 First Trimester: Developing Organ Systems During the first trimester, all the organ systems begin to develop and form. At four weeks, the brain and spinal cord are developing. By eight weeks, bone cells are forming, and the embryo is called a fetus. By 12 weeks in fetal development, the organ systems have formed. On average, at the end of the first trimester, the fetus is about ____ grams and about ___ cm long.

68 Sexual Reproduction 6.2 First Trimester: Developing Organ Systems During the first trimester, all the organ systems begin to develop and form. At four weeks, the brain and spinal cord are developing. By eight weeks, bone cells are forming, and the embryo is called a fetus. By 12 weeks in fetal development, the organ systems have formed. On average, at the end of the first trimester, the fetus is about 28 grams and about ___ cm long.

69 Sexual Reproduction 6.2 First Trimester: Developing Organ Systems During the first trimester, all the organ systems begin to develop and form. At four weeks, the brain and spinal cord are developing. By eight weeks, bone cells are forming, and the embryo is called a fetus. By 12 weeks in fetal development, the organ systems have formed. On average, at the end of the first trimester, the fetus is about 28 grams and about 9 cm long.

70 Sexual Reproduction 6.2 First Trimester: Developing Organ Systems During the first trimester, all the organ systems begin to develop and form. At four weeks, the brain and spinal cord are developing. By eight weeks, bone cells are forming, and the embryo is called a fetus. By 12 weeks in fetal development, the organ systems have formed. On average, at the end of the first trimester, the fetus is about 28 grams and about 9 cm long.

71 Sexual Reproduction 6.2 Second Trimester: Growth The fetus grows rapidly from 12 weeks to 16 weeks. Then growth ____ between 20 weeks and 24 weeks. By 20 weeks, the mother can feel the fetus ________. By the end of the second trimester, the fetus weighs about _____ grams and is ____ cm long.

72 Sexual Reproduction 6.2 Second Trimester: Growth The fetus grows rapidly from 12 weeks to 16 weeks. Then growth slows between 20 weeks and 24 weeks. By 20 weeks, the mother can feel the fetus ________. By the end of the second trimester, the fetus weighs about _____ grams and is ____ cm long.

73 Sexual Reproduction 6.2 Second Trimester: Growth The fetus grows rapidly from 12 weeks to 16 weeks. Then growth slows between 20 weeks and 24 weeks. By 20 weeks, the mother can feel the fetus moving. By the end of the second trimester, the fetus weighs about _____ grams and is ____ cm long.

74 Sexual Reproduction 6.2 Second Trimester: Growth The fetus grows rapidly from 12 weeks to 16 weeks. Then growth slows between 20 weeks and 24 weeks. By 20 weeks, the mother can feel the fetus moving. By the end of the second trimester, the fetus weighs about 650 grams and is ____ cm long.

75 Sexual Reproduction 6.2 Second Trimester: Growth The fetus grows rapidly from 12 weeks to 16 weeks. Then growth slows between 20 weeks and 24 weeks. By 20 weeks, the mother can feel the fetus moving. By the end of the second trimester, the fetus weighs about 650 grams and is 35 cm long.

76 Sexual Reproduction 6.2 Third Trimester: Continued Growth In the third trimester, the fetus continues to grow in ____________ for birth. This includes significant growth of the _______. By 32 weeks, or the 8 th month, _____ is deposited under the skin to help insulate and keep the baby ______ after birth. At the end of the third trimester, the fetus weighs approximately _____ grams and is ___ to ___ cm long.

77 Sexual Reproduction 6.2 Third Trimester: Continued Growth In the third trimester, the fetus continues to grow in preparation for birth. This includes significant growth of the _______. By 32 weeks, or the 8 th month, _____ is deposited under the skin to help insulate and keep the baby ______ after birth. At the end of the third trimester, the fetus weighs approximately _____ grams and is ___ to ___ cm long.

78 Sexual Reproduction 6.2 Third Trimester: Continued Growth In the third trimester, the fetus continues to grow in preparation for birth. This includes significant growth of the brain. By 32 weeks, or the 8 th month, _____ is deposited under the skin to help insulate and keep the baby ______ after birth. At the end of the third trimester, the fetus weighs approximately _____ grams and is ___ to ___ cm long.

79 Sexual Reproduction 6.2 Third Trimester: Continued Growth In the third trimester, the fetus continues to grow in preparation for birth. This includes significant growth of the brain. By 32 weeks, or the 8 th month, fat is deposited under the skin to help insulate and keep the baby ______ after birth. At the end of the third trimester, the fetus weighs approximately _____ grams and is ___ to ___ cm long.

80 Sexual Reproduction 6.2 Third Trimester: Continued Growth In the third trimester, the fetus continues to grow in preparation for birth. This includes significant growth of the brain. By 32 weeks, or the 8 th month, fat is deposited under the skin to help insulate and keep the baby warm after birth. At the end of the third trimester, the fetus weighs approximately _____ grams and is ___ to ___ cm long.

81 Sexual Reproduction 6.2 Third Trimester: Continued Growth In the third trimester, the fetus continues to grow in preparation for birth. This includes significant growth of the brain. By 32 weeks, or the 8 th month, fat is deposited under the skin to help insulate and keep the baby warm after birth. At the end of the third trimester, the fetus weighs approximately 3300 grams and is ___ to ___ cm long.

82 Sexual Reproduction 6.2 Third Trimester: Continued Growth In the third trimester, the fetus continues to grow in preparation for birth. This includes significant growth of the brain. By 32 weeks, or the 8 th month, fat is deposited under the skin to help insulate and keep the baby warm after birth. At the end of the third trimester, the fetus weighs approximately 3300 grams and is 40 to 50 cm long.

83 Sexual Reproduction 6.2 Third Trimester: Continued Growth In the third trimester, the fetus continues to grow in preparation for birth. This includes significant growth of the brain. By 32 weeks, or the 8 th month, fat is deposited under the skin to help insulate and keep the baby warm after birth. At the end of the third trimester, the fetus weighs approximately 3300 grams and is 40 to 50 cm long.


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