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A member asked:
There are 2 sphincters in the anus. an internal and external. which one is voluntary and which is involuntary. and why?
A doctor has provided 1 answer
The first: One, involuntary, keeps some pressure so things just don't run. The second one helps you control when you are not near a bathroom. The function of the latter could be affected by several conditions.
Answered 1/28/2015
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