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The anus is the end of the line for the alimentary canal. During defecation, waste passes from the rectum, through the anal canal, and out through the anus.
Definition of Anus
The anus is the end of the line for the alimentary canal. The anal canal lies to the north of the anus and the light of day is to the south. During defecation, waste passes from the rectum, through the anal canal, and ultimately out through the anus.
Diagram of the Anus
This diagram shows where the anus is in relation to the entire large intestine.

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