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internal sphincter muscle of urethra |
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internal sphincter muscle of urethra,
a circular layer of smooth muscle fibers, innervated by the vesical nerve, that surrounds the internal urethral orifice in males and acts to close it. No such structure exists in females. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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