Reproductive system
Function of the reproductive system Reproduction – creating offspring Continuation of a species relies on this system
Types of reproduction Sexual asexual
Asexual reproduction Only involves one parent Growth of an embryo or seed can grow without fertilization of a male Sharks, water fleas, aphids, fish, bacteria
Sexual reproduction Involves both the eggs by the female and sperm by the male The egg and sperm join together during fertilization to produce a zygote, embryo, seed Both plants (angiosperms) and animals reproduce this way
Sex cells (sperm and egg cells) Contain Chromosomes Only cell in the body that does not contain a nucleus
chromosomes carry the genetic information that controls inherited characteristics Eye color blood type 23 chromosomes in each type of sex cell (sperm and egg) Zygote that is produced in fertilization will have 46 chromosomes which is needed for life
feMale reproductive system Designed to carry out several functions Produce eggs (female reproductive cells) necessary for reproduction Conception Pregnancy If pregnancy does not occur it is designed to menstruate Produce female sex hormones that maintain the reproductive cycle
Male reproductive system Designed to carry out several functions Produce, maintain, and transport sperm (male reproductive cell) and protective fluid (semen) Produce and secrete male sex hormones responsible for maintaining the male reproductive system
fertilization Can be both internal and external Reptiles and birds end with a shell Kangaroo has special pouch Higher animals inside the womb Internal the male sex cell fertilizes the female sex cells External the sex cells meet outside the body