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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.. Join today to enjoy premium 18+ videos and photos available only on our Telegram channel. Internal anal sphincter muscles: The inner ring of muscles. It works all the time to keep the stool (poo in and relaxes when opening your do not. muscle anal Unlock an exclusive world of adult content on our Telegram channel—join today and never miss out! The anal sphincter is a pair of muscles at the end of the rectum that controls the release of stool. When these muscles become damaged, you may. Click "open" and join our channel to never miss out on any of the action! Your ultimate source of hot adult content is just a click away! 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.
