title: Systems of life. The digestive system--Part 4.
authors.forename: A
authors.initials: A
authors.lastname: Roberts
mesh_terms: D003672:Defecation / Q000502:physiology; D004064:Digestive System / Q000033:anatomy & histology*; D004068:Digestive System Physiological Phenomena; D005767:Gastrointestinal Diseases / Q000503:physiopathology*; D006801:Humans