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muscle anal The internal anal sphincter, IAS, or sphincter ani internus is a ring of smooth muscle that surrounds about .–. cm of the anal canal.. Subscribe now to experience the ultimate collection of 18+ videos and photos. Ringlike muscles called sphincters surround your anus and keep it closed until they're activated to let your poop come out. What is the. muscle anal Watch the best porn content available on our Telegram channel. The external anal sphincter (or sphincter ani externus is an oval tube of skeletal muscle fibers. Distally, it is adherent to the skin surrounding the. Hit the "open" button and join our channel. Discover the hottest adult content available just for you. Where are the anal sphincter muscles? The internal and external anal sphincter muscles are two interconnected rings of muscles at the lower end of the rectum.
