[X-ray cinematographical observation on the defecation mechanism].
D001003:Anal Canal / Q000502:physiology; D003106:Colon / Q000000981:diagnostic imaging; D003672:Defecation; D005769:Gastrointestinal Motility; D006801:Humans; D009040:Motion Pictures; D011859:Radiography; D012007:Rectum / Q000000981:diagnostic imaging