Abdominal and thoracic pressures during defecation.
D000005:Abdomen / Q000502:physiology; D003672:Defecation; D004947:Esophagus / Q000502:physiology; D006551:Hernia, Hiatal / Q000209:etiology; D006801:Humans; D011312:Pressure; D013909:Thorax / Q000502:physiology