Mammalian Reproduction: The Male Reproductive System
Chapter 16 of our study of human reproduction delves into the male reproductive system. At the core of the male reproductive system are the testes - the male gon
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About Mammalian Reproduction: The Male Reproductive System
PowerPoint presentation about 'Mammalian Reproduction: The Male Reproductive System'. This presentation describes the topic on Chapter 16 of our study of human reproduction delves into the male reproductive system. At the core of the male reproductive system are the testes - the male gon. The key topics included in this slideshow are . Download this presentation absolutely free.
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Slide1Chapter 16 ~ HumanReproduction
Slide2Mammalian reproduction, Iu The Human Male u Testes ~ male gonads – Contained w/in scrotum due to temp. u Seminiferous tubules ~ sperm formation (spermatogenesis) u Leydig cells ~ hormone production u Epididymis ~ sperm development u Vas deferens ~ sperm propulsion u Seminal vesicles ~ semen u Prostate gland ~ anticoagulant; nutrients, sperm activation u Bulbourethral glands ~ acid neutralizer – cleanses urethra u Penis/urethra ~ semen delivery
Slide3Mammalian reproduction, IIu The Human Female u Ovaries~ female gonads u Follicle~ egg capsule – Oocyte – immature egg u Graafian follicle – contains mature eggs – ovulation (release) u Corpus luteum~ hormone secretion u Oviduct (fallopian tubes)~ fertilization u Uterus/endometrium~ womb/lining – implantation site u Cervix/vagina~ sperm receptacle
Slide4Spermatogenesisu Puberty until death! u Seminiferous tubules ~ location u Primordial germ cell (2N)~ differentiate into…. u Spermatogonium (2N) ~ sperm precursor u Repeated mitosis into…. u Primary spermatocyte (2N) u 1st meiotic division u Secondary spermatocyte (1N) u 2nd meiotic division u Spermatids (1N)~ Sertoli cells provide nutrients u Sperm cells (1N)
Slide5Oogenesisu As embryo until menopause... u Ovaries u Primordial germ cells (2N) u Oogonium (2N) u Primary oocyte (2N) u Between birth & puberty; prophase I of meiosis u Puberty; FSH; completes meiosis I u Secondary oocyte (1N); polar body u Meiosis II; stimulated by fertilization u Ovum (1N); 2nd polar body
Slide6The female patternu Ovarian/Menstrual cycles~ • u Menstrual phase – endometrium sloughs off u Proliferative (follicular) phase – endometrium repairs and thickens – Follicle-stimulating hormone (FSH) – causes primary follicle to grow – Ovulation occurs – release of oocyte – triggered by luteinizing hormone (LH) u Secretory (luteal) phase – glands release nutrients and lining becomes vascularized
Slide7Embryonic & fetal developmentu Gestation ~ pregnancy u 1st trimester : u organogenesis u fetus (week 8; all adult features) u HCG (human chorionic gonadotropin) hormone (menstruation override; pregnancy test detection) u Parturition ~birth u Labor ~uterine contractions u Lactation ~prolactin (triggered by parturition) & oxytocin (triggered by nursing) – Mammary glands
Slide8Modern technologies
