Sphincter ani externus muscle
From WikiMD's Food, Medicine & Wellness Encyclopedia
Inserts to S4 and twigs from inferior anal nerves of pudendal nerve keep the anal canal and anus closed, aids in the expulsion of the feces, supplied by pudendal nerve, and it keep the anal canal and anus closed, aids in the expulsion of the feces
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Contributors: Prab R. Tumpati, MD
