Presentation on theme: "Safe version Reproductive system. The Endocrine System The Male and Female Reproductive Systems The Human Life Cycle Table of Contents."— Presentation transcript:
Safe version Reproductive system
The Endocrine System The Male and Female Reproductive Systems The Human Life Cycle Table of Contents
The Endocrine System Functions of Endocrine Glands The endocrine glands include the hypothalamus, pituitary, thyroid, parathyroid, adrenal, thymus, and pancreas.
The Endocrine System Functions of Endocrine Glands The ovaries in females and testes in males are also endocrine glands.
The Endocrine System Functions of Endocrine Glands The pituitary gland communicates with the hypothalamus to control many body activities.
The Endocrine System Negative Feedback Through negative feedback, when the amount of a particular hormone in the blood reaches a certain level, the endocrine system sends signals that stop the release of that hormone.
Negative Feedback Activity Click the Active Art button to open a browser window and access Active Art about negative feedback. Web Code : cep-4071 The Endocrine System
Relating Cause and Effect As you read, identify the effects of pituitary hormones. Write them in a graphic organizer like the one below. Pituitary hormones Activate other glands Regulate growth Regulate water balance Regulate blood pressure Cause Effects The Endocrine System
The Male and Female Reproductive Systems Male Reproductive System The male reproductive system is specialized to produce sperm and the hormone testosterone. The structures of the male reproductive system include the testes, scrotum, and penis.
The Male and Female Reproductive Systems Female Reproductive System The role of the female reproductive system is to produce eggs and, if an egg is fertilized, to nourish a developing baby until birth. The organs of the female reproductive system include the ovaries, fallopian tubes, uterus, and vagina.
The Male and Female Reproductive Systems The Menstrual Cycle During the menstrual cycle, an egg develops in an ovary. At the same time, the uterus prepares for the arrival of an embryo.
Sequencing As you read, make a cycle diagram like the one below that shows the menstrual cycle. Write each event of the process in a separate circle. The Menstrual Cycle Days 1–4 Menstrual discharge Days 5–13 Developing egg Days 14–15 Ovulation Days 16–22 Egg moves through oviduct Days 23–28 Egg enters uterus The Male and Female Reproductive Systems
End of Section: The Male and Female Reproductive Systems
The Human Life Cycle Protection and Nourishment The membranes and other structures that form during development protect and nourish the developing embryo, and later the fetus.
The Human Life Cycle Birth There are two types of twins: identical twins and fraternal twins.
Building Vocabulary After you read section 3, reread the paragraphs that contain definitions of Key Terms. Use all the information you have learned to write a sentence using each Key Term. The Human Life Cycle Key Terms:Examples: embryoUntil the ninth week of pregnancy, the developing baby is called an embryo. fetusFrom the ninth week of development until birth, the developing human is called a fetus. amniotic sacOne membrane surrounds the embryo and develops into a fluid-filled sac called the amniotic sac. placentaThe placenta is the link between the embryo and the mother. Key Terms:Examples: umbilical cord adolescence puberty A ropelike structure called the umbilical cord forms between the fetus and the placenta. The stage of development during which children become adults physically and mentally is called adolescence. Puberty is the period of sexual development in which the body becomes able to reproduce.
Links on Before Birth Click the SciLinks button for links on before birth. Web code: scn-0473 The Human Life Cycle
Growth and Development Click the Video button to watch a movie about growth and development. The Human Life Cycle
End of Section: The Human Life Cycle
Graphic Organizer Egg is fertilized. Zygote is formed. Embryo develops. Fetus develops. Baby is born.