The Human Body

Alimentary Canal

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Alimentary Canal, in anatomy, the principal part of the digestive system. It begins at the mouth and extends to the anus, having, in humans, an average length of about 9 m (about 30 ft). Passing through the head, neck, and body, it includes the mouth, pharynx, esophagus, stomach, small intestines, cecum, and large intestines.