Loss from the small intestine.
D000818:Animals; D002452:Cell Count; D002463:Cell Membrane Permeability; D002465:Cell Movement; D002468:Cell Physiological Phenomena; D006801:Humans; D007421:Intestine, Small / Q000502:physiology* / Q000503:physiopathology; D008854:Microscopy, Electron; D008970:Molecular Weight; D011817:Rabbits; D051381:Rats; D014882:Water-Electrolyte Balance