Kidney morphology: update 1985.

Many new observations have been made correlating changes in renal morphology with changes in renal function. These changes have led to a better definition of the various segments which make up the renal tubule. These morphological patterns vary in different species as is documented by morphologic studies and by differences in the patterns of enzymes in various nephron segments. The subdivision of cells located in the mesangial region of the glomerulus into several types may provide new areas to study with respect to disease processes.