Male Reproductive System PDF

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Summary

Male Reproductive SystemMale Testicle Seminiferous tubules – site if spermatogenesis and contain Sertoli cells to support development  Straight tubules – connects spermatozoa from the tubules to the rete testis  Rete testis – network of tubes that move spermatozoa to efferent ductules  Efferent ...

Description

Male Reproductive System Male Testicle      

Seminiferous tubules – site if spermatogenesis and contain Sertoli cells to support development Straight tubules – connects spermatozoa from the tubules to the rete testis Rete testis – network of tubes that move spermatozoa to efferent ductules Efferent ductules – carries spermatozoa from rete testis to the head, body and tail of the epididymis Epididymis – where spermatozoa mature Ductus/Vas deferens – moves spermatozoa away from the testicles

Ductal System      

Ampulla of vas – drains into the ejaculatory duct Seminal vesicles – spermatozoa do not enter these, they produce a mucous like substance in the ejaculatory fluid Both meet at the ejaculatory duct Ejaculatory duct – surrounded by the prostate, spermatozoa enter the prostatic urethra Membranous urethra Penile urethra

Endocrine Regulation  

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Hypothalamus releases GnRH Stimulates the anterior pituitary to release FSH - FSH releases Sertoli cells to release androgen binding protein (ABP) and inhibin - Inhibin feeds back to anterior pituitary to inhibit FSH production Anterior pituitary also produces LH - LH stimulates the Leydig cells - Leydig cells re located in between seminiferous tubules and produce testosterone - Testosterone binds to ABP and maintains high levels of androgen within the seminiferous tubules - Stimulates the production of spermatozoa Testosterone feedback to hypothalamus and anterior pituitary to inhibit the release of LH - Testosterone is also release to target other areas in the body such as muscles...