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Anus - Anatomy & Physiology (view source)

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==Histology==

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[[Image:Anal Sacs.jpg|thumb|right|150px|Anal ~~Sacs~~- Copywright RVC 2008]]

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[[Image:Anal Sacs.jpg|thumb|right|150px|Anal Glands- Copywright RVC 2008]]

*At the anus, the columnar intestinal epithelium is replaced by the stratified squamous keratinised epithelium of the skin.

*As the muscosa changes from columnar to cutaneous, three zones are created:

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