KINESIOL 1A03 Lecture Notes - Lecture 5: Seminiferous Tubule, Yolk Sac, Spermatocyte
29 Oct 2018
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Document Summary
Spermatogenesis: the development and production of mature spermatozoa. Pathway: spermatogonia (stem cell) primary spermatocyte secondary spermatocyte spermatid sperm cell (spermatozoon) Spermatogonia is developed from the primordial germ cell which arise from the yolk sac and enters the testes during the 5th week of development. In the embryonic testes the primordial germ cells differentiate into spermatogonia, which remain dormant during childhood and actively begin producing sperm at puberty. Toward the lumen of the seminiferous tubule are layers of progressively more mature cells. In order of advancing maturity, these are primary spermatocytes, secondary spermatocytes, spermatids, and sperm cells. After a sperm cell, or spermatozoon, has formed, it is released into the lumen of the seminiferous tubule. Seminal fluid contributes to healthy sperm motility and viability by: It"s alkaline nature helps to neutralize the acidic environment of the male urethra and female reproductive tract that otherwise would inactivate and kill sperm. The fructose is used for atp production by sperm.
