kidney morphological measurement kidney molecular composition measurement 2013-11-04T17:14:28Z Any quantification of the amounts or proportions of proteins, lipids, minerals, nutrients, gases, or other substances ina specified sample of kidney tissue, that is, tissue from one or both of the paired organs which function to maintain proper water and electrolyte balance, regulate acid-base concentration, and filter the blood of metabolic wastes. JSmith tissue molecular composition measurement