5b. Male Anatomy 2010

5b. Male Anatomy 2010 - Male Anatomy Male Anatomy Male...

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Male Anatomy
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Male Anatomy Male Anatomy • Primary Organ Primary Organ – testes, genetically determined in mammals testes, genetically determined in mammals - testis releases hormones that then control the testis releases hormones that then control the development of secondary sex characteristics development of secondary sex characteristics - Secondary Organs Secondary Organs – internal duct system internal duct system • e.g., vas deferens, e.g., vas deferens, epididymus epididymus – external genitalia external genitalia • Secondary Sexual Characters Secondary Sexual Characters – e.g., antlers, coloration, facial hair e.g., antlers, coloration, facial hair
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Eutherian Mammal Testes • Paired and oval shaped • Shiny connective covering called the Tunica Albuginea • Divided into testicular lobules – Approximately 250 in human testis
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Seminiferous tubules (ST) Each testicular lobule contains several coiled seminiferous tubules (ST) – ST site of sperm production Each ST ~ 1.3 ft in humans Total length of ST almost the length of a football field
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5b. Male Anatomy 2010 - Male Anatomy Male Anatomy Male...

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