Carpenter's principles of human physiology . Cystin. Fig. Urea. CHEMICAL COMPOSITION OF THE BODY. 81 undergoing putrefaction, effect its conversion intoammonium carbonate. It uniteswith nitric and oxalic acids to form salts. It is isomeric with ammonium cyanate,contains 46 per cent, of nitrogen, and is one of the terminal products of theretrogressive metamorphosis of the albuminous compounds in man. Itsextreme solubility, and the facility with which as a crystalloid it permeatesanimal membranes, permit it to be readily discharged by the urine, of whichit is the most important organic constitue
Carpenter's principles of human physiology . Cystin. Fig. Urea. CHEMICAL COMPOSITION OF THE BODY. 81 undergoing putrefaction, effect its conversion intoammonium carbonate. It uniteswith nitric and oxalic acids to form salts. It is isomeric with ammonium cyanate,contains 46 per cent, of nitrogen, and is one of the terminal products of theretrogressive metamorphosis of the albuminous compounds in man. Itsextreme solubility, and the facility with which as a crystalloid it permeatesanimal membranes, permit it to be readily discharged by the urine, of whichit is the most important organic constituent. Animal Quinoidin.—From the experiments of Dr. Bence Jones and M. ,* it appears there exists in the bodies of man and other vertebrata asubstance which can be extracted from any of the tissues by the same processas quinine, when that alkaloid has been ingested and absorbed. It possessesnearly the same chemical properties as quinine, and its solutions give the well-known fluorescence characteristic of that alkaloid. 57. Biliary Compounds.—C
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