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Reproductive Systems

Reproductive Systems. Chapter 28. MEIOSIS. Testes Ducts Accessory glands Penis. Tubular Sequence. Seminiferous tubules Rete Epididymis – 20 feet long, 10 to 14 days to travel. Vas deferens – 18 inches Ejaculatory duct Urethra Total travel time = (64 to 72 days). Leydig cells produce

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Reproductive Systems

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  1. Reproductive Systems Chapter 28

  2. MEIOSIS

  3. Testes • Ducts • Accessory glands • Penis

  4. Tubular Sequence • Seminiferous tubules • Rete • Epididymis – 20 feet long, 10 to 14 days to travel. • Vas deferens – 18 inches • Ejaculatory duct • Urethra • Total travel time = (64 to 72 days)

  5. Leydig cells produce Testosterone. Sertoli cells (sustentacular) Create blood testes barrier And nourish spermatocytes.

  6. Male Accessory Glands • Seminal vesicles – alkaline fluid with fructose, ascorbic acid and enzymes. • Prostate – secretes citrate, enzymes and PSA. • Bulbourethral (Cowper’s) Gland – neutralizes acids. _______________________________ Semen = 2 to 5 ml with 50 to 130 million sperm per ml.

  7. Hormones: • FSH = follicle stimulating hormone • acts on Sertoli cells • 2. LH = luteinizing hormone that acts on • Leydig cells to secrete testosterone. • 3. Inhibin

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