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 Testosterone. Sertoli cells (sustentacular) Create blood testes barrier And nourish spermatocytes.
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.
Hormones: FSH = follicle stimulating hormone acts on Sertoli cells 2. LH = luteinizing hormone that acts on Leydig cells to secrete testosterone. 3. Inhibin