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===Recto-Anal Junction===
===Recto-Anal Junction===
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[[Image:Recto-Anal Junction.jpg|thumb|right|150px|Recto-Anal Junction Copyright RVC 2008]]
*Termination of the lamina muscularis and longitudinal layer of the tunica muscularis.
*Termination of the lamina muscularis and longitudinal layer of the tunica muscularis.
*The circular layer of the tunica muscularis forms the internal anal sphincter.
*The circular layer of the tunica muscularis forms the internal anal sphincter.