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The anus continues from the rectum via the anal canal and is the final segment of the large intestine, functioning as the external outlet of the gastrointestinal tract, through which faecal matter is expelled. Defecation is controlled by the internal and external anal sphincters, which surround the top and bottom of the anus.
Latest Research and Reviews
Nature Reviews Gastroenterology & Hepatology 15, 309-323