BIOL 230 Lecture Notes - Lecture 5: Male Reproductive System, Defensin, Epididymis
29 Jul 2018
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Document Summary
The bulk of the testes consist of compact seminiferous tubules. At puberty, spermatogenesis begins in the walls of the seminiferous tubules, and the completed spermatozoa are released into the lumen. The interstitial leydig cells lie between the seminiferous tubules; they begin producing testosterone at puberty. Testosterone is responsible for the development of spermatogenesis and the male reproductive system, including secondary sexual characteristics and libido. In addition, testosterone is generally anabolic; that is, it promotes protein synthesis and bone elongation. inguinal canal: canal the testis pass through from the abdominal cavity to the scrotum. Process induced by testosterone from the fetal testes. Descent is usually complete by the seventh month of gestation. Cryptochidism: "hidden testis: when testis remain undescended into adulthood. Unable to produce viable sperm as descent of the testes into this cooler environment is essential, because spermatogenesis is temperature sensitive.
