#anus__arse__arsehole__asshole excretory opening at the end of the alimentary canal
supertype: #orifice__opening__porta an aperture or hole opening into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"
part: #anal_sphincter
part of: #rectum
subtype: #imperforate_anus a congenital defect of the anus; there is partial or complete obstruction of the anal opening
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