Male Reproductive System

Male Reproductive System - The Male Reproductive System...

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The Male Reproductive System
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Differentiation of the Embryo
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Gonad Development n The male and Female gonads are derived, embryologically, from the same site in the body. n All fetuses start out as female. Under the influence of the Y chromosome “masculization” occurs. Default development is female. A gene on the Y chromosome identified as SRY starts a chain of gene- expression reactions that causes STEROID SYNTHESIS , specifically TESTOSTERONE which causes the testis development pathway. Without testosterone, the “default” or female pathway is followed.
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Sexual Dimorphisms n The glands penis and its prepuce and the clitoris and its prepuce are actually sexually dimorphic analogous structures . n They both contain a shaft, glands and spongy tissue which becomes engorged with blood when stimulated. They are highly sensitive.
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Penile Components n The scrotum is the pouch that contains the testes and maintains their temperature at approximately 93.6 degree Fahrenheit to allow for spermatogenesis. n Epididymis where the mature sperm are stored(located at surface of each testis). n
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Male Reproductive System - The Male Reproductive System...

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