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Large Intestine
...  sphincter prepares for release of the fecal material. Once the fecal material reaches the anal canal, most people would not be able to repress the urge anymore. Defecation takes place as the rectum muscles contract, and rectal pressure increases. The pelvic skeletal muscles and the sphincter muscles contract and relax (respectively) to help defecation. This would put up the fecal matter for  ...

Tunics
...  contractions and peristaltic contractions to the gastrointestinal tract. This is done because the muscularis is formed by smooth muscle topped with a wise layer of more smooth muscles. These muscles contract, and food then is undulated all over the digestive system. The pulverization of the food gets easier, too, with the help of digestive enzymes. Between the layers of the muscularis  ...


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