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Reproductive System Development (view source)
Revision as of 09:35, 22 August 2011
, 09:35, 22 August 2011→Pimary Sexual Differentiation Phase
===Pimary Sexual Differentiation Phase===
===Pimary Sexual Differentiation Phase===
This phase represents the initial phase of differentiation of reproductive tissues. The male Y chromosome in mammals contains genetic code that results in the production of '''testes-determining factor (TDF)''' which is responsible for causing the gonads to develop into testes. In the female fetus, TDF is not produced as there is no Y chromosome and therefore the gonads develop into ovaries.
This phase represents the initial phase of differentiation of reproductive tissues. The male Y chromosome in mammals contains genetic code that results in the production of '''testes-determining factor (TDF)''' which is responsible for causing the gonads to develop into testes. In the female fetus, TDF is not produced as there is no Y chromosome and therefore the gonads develop into ovaries.
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At this stage of development the gonads do not have their own excretory ducts. In males the excretory ducts from the developing kidney, the '''Wolfian Ducts''' facilitate the excretion of spermatozoa away from the testes. These Wolfian Ducts develop into male accessory reproductive structures that include the epididymis and spermatic ducts aswell as connecting the developing testes where they connect a system of tubules, the ''rete testis''. These tubular connections collect spermatozoa from the seminiferous tubules resulting in a continuous tube system that facilitates the transport of spermatozoa to the external environment.
===Secondary Sexual Differentiation Phase===
===Secondary Sexual Differentiation Phase===