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The rectum is about eight inches long and serves, basically, as a warehouse for poop.
Definition of Rectum
The rectum is about eight inches long and serves, basically, as a warehouse for poop. The rectum has little shelves in it called transverse folds. These folds help keep stool in place until you're ready to go to the bathroom.
Diagram of the Rectum
This diagram shows where the rectum is in relation to the entire large intestine.

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