Defaecation and the anal sphincters.
D000328:Adult; D001003:Anal Canal / Q000294:innervation / Q000502:physiology* / Q000503:physiopathology; D002648:Child; D003248:Constipation / Q000503:physiopathology; D003672:Defecation; D005242:Fecal Incontinence / Q000503:physiopathology; D005401:Fissure in Ano / Q000503:physiopathology; D006484:Hemorrhoids / Q000503:physiopathology; D006627:Hirschsprung Disease / Q000503:physiopathology; D006801:Humans; D009132:Muscles / Q000503:physiopathology; D011312:Pressure; D012677:Sensation