KNES 191B Lecture Notes - Lecture 13: Seminiferous Tubule, Sertoli Cell, Anterior Pituitary
16 Aug 2016
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Sexual production involves two genetically distinct parents: one set of chromosomes from mother, one from father. Gametes produced by gonads (testes or ovaries): testes produce sperm, ovaries produce eggs/oocytes. During development, humans, regardless of sex, have a common gonad: referred to as the bipotential gonad. Occurs in the male fetus due to expression of the sry region on the y chromosome: causes a secretion of a substance called mullerian inhibiting substance and a protein called insulin like growth factor (ins13). These secretions altogether cause the breakdown of the. Wolffian duct differentiates into the epididymis and vas deferens. If the sry section of y chromosome does not express, mullerian duct develops to ovarian duct and cervix: the wolffian duct breaks down, however. Males: during puberty, testes descend into scrotum. Protect the sperm and keep them safe from outside forces. They are away from the body"s warmth, which can overheat them: prostate gland and bulbourethral gland important for production of sperm.
