#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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