What is the function of anal sphincter?
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An anal sphincter is a group of muscles at the end of the rectum that surrounds the anus and controls the release of stool, thereby maintaining continence. There are two sphincter muscles: one is internal and one is external. The external muscle helps maintain continence and keep stool in the rectum.
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The exit of the waste material from the body is regulated by the anal sphincter via anus.
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