anus

1. The excretory opening at the end of the alimentary canal (synset 105545649)
   is a type of: opening, orifice, porta - an aperture or hole that opens into a bodily cavity
   subtypes:

   • arse, arsehole, asshole, bunghole - vulgar slang for anus
   • imperforate anus - a congenital defect of the anus; there is partial or complete obstruction of the anal opening
   has: anal sphincter, musculus sphincter ani, sphincter ani - the sphincter muscle of the anus
   is a part of: rectum - the terminal section of the alimentary canal; from the sigmoid flexure to the anus

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