title: Systems of life. No 145. Senior systems. 10.
mesh_terms: D000368:Aged; D003248:Constipation / Q000503:physiopathology / Q000517:prevention & control*; D006801:Humans; D007420:Intestine, Large / Q000502:physiology*; D007421:Intestine, Small / Q000502:physiology*; D008286:Malabsorption Syndromes / Q000503:physiopathology*