PHY3181 Lecture 1: Male Reproduction
10 Feb 2019
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Anterior pituitary (base of brain) lh, fsh. Castration of animal evidence for feedback on pituitary. Immediately after increased levels of fsh and lh. Castration removes sertoli cells negative feedback of inhibin (increasing fsh) Primary failure lh, fsh increased: makes testes smaller, gonadotrophins hyper. Secondary lh, fsh decreased: testes also smaller, gonadotrophins hypo. Vas deferens = sperm transport connecting tube: tie off for vasectomy, hormonal and sperm production stays exactly the same. Bulbourethral gland: these 3 are accessory sex organs. On the outside by the time of birth. Don"t really know why they sit outside the body: testes prefer to be at a lower body temperature, plexus of arteries and veins going into testis, specialised spermatic blood supply, at high temperatures spermatogenesis stops. Testicular descent doesn"t happen in all animals can remain abdominal. Thick capsule outside testes tunica albuginea. Rete testis collecting ducts of the testes. In prac take out an individual cord compare seminiferous tubule to a control.
