title: Systems of life. No 139. Senior systems. 4.
mesh_terms: D000368:Aged; D000375:Aging; D000855:Anorexia / Q000503:physiopathology; D004064:Digestive System / Q000033:anatomy & histology / Q000503:physiopathology*; D004066:Digestive System Diseases / Q000175:diagnosis / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male