ANUS

Anus

The anus is an opening at the opposite end of an animal's digestive tract from the mouth. Its function is to control the expulsion of feces, unwanted semi-solid matter produced during digestion, which, depending on the type of animal, may include: matter which the animal cannot digest, such as bones; food material after all the nutrients have been extracted, for example cellulose or lignin; ingested matter which would be toxic if it remained in the digestive tract; and dead or excess gut bacteria and other endosymbionts.

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anus

Noun

  1. The lower opening of the alimentary canal, through which feces and flatus are ejected.


The above text is a snippet from Wiktionary: anus
and as such is available under the Creative Commons Attribution/Share-Alike License.

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