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Chapter 17 Reproduction in Humans Lesson 1 - Human Reproductive System
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3. Overview 2 types of reproduction Sexual reproduction Asexual reproduction - the process where two cells (gametes) fuse to form one fertilized cell or zygote - any type of reproduction not involving the union of gametes
4. Animal Reproduction Budding: reproduction Fission: regeneration & reproduction Asexual Reproduction Parthenogenesis: Haploid eggs develop into adults without fertilization e.g. male honeybees
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9. Sperm production 46 chromosomes 23 chromosomes 23 chromosomes 23 chromosomes 23 chromosomes diploid (2n) haploid (n) haploid (n) haploid (n) haploid (n) Definition of gamete : A reproductive cell containing the haploid number of chromosomes
11. Sperm Anatomy - sac containing enzymes that break down egg membrane so that sperm can penetrate during fertilization - provides energy for sperm activity - enables sperm to swim towards egg - carries haploid number of chromosomes
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14. Production of Eggs 46 chromosomes diploid (2n) 23 chromosomes haploid (n) Variations in the gametes, together with random fertilization produce variations in the offspring
15. Summary Cells in gonads of male and female parents sperm (n) egg (n) + Fertilization zygote (2n) (undergoes mitosis to form the embryo )
18. The Male Reproductive System Large intestine Rectum Seminal vesicle Prostate gland Cowper’s gland Epididymis Testis Scrotum Penis Urethra Vas deferens Pubic bone Urinary bladder 1. 2. 3. 4.
19. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Parts of the Male Reproductive System
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21. The Female Reproductive System Fallopian tube Ovary Urinary bladder Pubic bone Urethra Vagina Uterus Cervix Rectum Vagina Fallopian tube Ovary 1. 2. 3. 4.
As a follicle matures, the oocyte enlarges and is surrounded by layers of follicular cells and fluid. Eventually, ovulation occurs, the mature follicle ruptures, and the secondary oocyte is released. A single follicle actually goes through all stages in one place within the ovary. Primary follicles contain the oocyte and begin producing the sex hormone estrogen. Secondary follicles contain the secondary oocyte and produce the sex hormones estrogen and some progesterone. The vesicular (Graafian) follicle develops. Ovulation: The secondary oocyte is released. The corpus luteum produces the sex hormones progesterone and some estrogen. The corpus luteum degenerates.
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