a: The rectum ~
b: very elastic pipe
What: "The rectum is like a very elastic pipe with a set of muscular rings at the end, the anus. The anus acts as a plug, to stop things from going out, or let them in."
Useful?
Writer: Not Stated
LCC:
Where: Reference Link Has Evaporated
Date: Oct 30 2013 7:05 PM
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