title: The aging gastrointestinal tract.
mesh_terms: D000375:Aging; D001065:Appendix / Q000502:physiology; D003106:Colon / Q000502:physiology; D004064:Digestive System / Q000503:physiopathology; D004068:Digestive System Physiological Phenomena; D004947:Esophagus / Q000502:physiology; D006801:Humans; D007421:Intestine, Small / Q000502:physiology; D008099:Liver / Q000502:physiology; D013270:Stomach / Q000502:physiology