April 19, 2013 - Sexual Development

After gonads dieren7ate 16 dierengagon in males testes

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Unformatted text preview: hat propesl sperm from epidiymis during ejacula7on Seminal vesicle: gland that produces 60% of the volume that makes up semen (ejaculate). Semen contains fructose (energy source for sperm), and other chemicals (enzymes, mucus) Urethra: Pathway of ejaculate and of urine Penis: contains urethra and cylinders of erec7le 7ssue, which engorge with blood during arousal Pathway of sperm: Testies → vas deferens → seminal vesicle → urethra → out of penis Be familiar with these diagrams for the final, figures 15 DifferenGaGon of the internal reproducGve tracts Embryo has two sets of poten7al reproduc7ve ducts: • Wolffian ducts –form male internal reproduc7ve tract • Mullerian ducts –form female internal reproduc7ve tract Differen7a7on of reproduc7ve ducts occurs at 8-10 weeks of gesta7on in humans. (After gonads differen7ate) 16 DifferenGaGon in males Testes are producing testosterone and Mullerian inhibiting hormone (MIH) Testosterone causes Wolffian duckts to develop into male internal reproductive tract • Epididymus • Vas deferens (sperm duct) • Seminal vesicles MIH causes Müllerian ducts to degenerate • prevents males from developing a female internal reproductive tract Key: Differentiation of MALE reproductive tract REQ...
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This note was uploaded on 05/13/2013 for the course BIO-L 112 taught by Professor Dr.beckers during the Spring '13 term at Indiana.

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