生殖系统reproductionsystemppt课件

Chapter 17 Reproduction System,1 introduction p338, 358 2 Male p338-343 3 Female p343-348 4 Pregnancy p352 5 Birth control p354-355,1 Introduction p338, 358,1 Reproductive system: Its fully function till puberty Girl: at 11-13y Boy: at 14-16y Following this period, people can produce offspring 2 Reproductive functions： male produce sperm; femal produce eggs Sexual intercourse with each other, male & female Pregnancy: oofspring develops within the female body Sex hormones,2 Male Rep-system p338-342,1 Testes 10-20g/one, a pair Outside abdominal cavity(37) in scrotum(阴囊，34 ) Its developing: the last 2m in fetal Cryptorchidism (隐睾) Sterility(阉割) Man no ability to reproduce Table17.1 organs & functions,Interstitial cells: androgens, LH, PG (male sexH) 3 Seminiferous tubules: 200, D0.3mm, L1.5m Spermatogenesis: producing sperm Spermatogonia Primary spermatocytes Second spermatocytes Spermatids Spermatozoa/ Sperm-3 parts: tail/flagellum 60m middle piece/E-pro head/23cromoso 管壁基底层细胞由下向上逐渐分化、成熟 acrosome/enzymes,2 External genitals Epididymides (附睾): 5-6m, mature in it, 10d 3 vas deferens (输精管)：store here Urethra(射精管) Spermatic cords(精索) Scrotum (阴囊） Penis & glans(阴茎,龟头) Sperminal fluid(精液) from 3 glands Seminal vesicle(精囊腺） ProstateG(前列腺) BulbourethralG(尿道球腺),3 Regulation of male H p342,GnRH,FSH,Negative,FSH-spermatogensis LH-testosterone,-,3 Female Rep-system p343-350,1 Ovaries 4-8g/one Upper pelvi cavity A pair beside uterus Outer cortex-follicles Inner medulla Table17.2 organs & functions,Oogenesis: Follicles-oocytes,Primary follicle-P oocyte 46chromos Secondary F - Sec oocyte23chromos Vesicular F - egg/oocyte Relesaing into flibriae-uterine tube Corpus luteum Preberty: 2M; Puberty: 0.3-0.4M maturatedF: 400 in adult,No-pregnancy, 10d,Pregnancy, female sexH,2 Accessory organs,Uterine tubes-fertilization Uterus-zygote formation/embryo Vagina- birth canal External genitals,3 Regulation of female H p347,+,+,-,-,4 Ovarian cycle Uternie cycle,1-4d,4-14d,15-28d,4 Fertilization & Pregnancy p352,1Fertilization: sperm combined with ocyte N.sperm surround oocyte Acrosome-enzyme Soluble membrane Asperm into oocyte Zygote,2 Pregn