[Photo-optical observations on the mechanism of defecation in man].
D001003:Anal Canal / Q000000981:diagnostic imaging / Q000503:physiopathology; D001466:Barium Sulfate; D003287:Contrast Media; D003672:Defecation; D005769:Gastrointestinal Motility; D006801:Humans; D009040:Motion Pictures; D011859:Radiography; D012007:Rectum / Q000000981:diagnostic imaging / Q000502:physiology
D003287:Contrast Media; D001466:Barium Sulfate