Elimination of Urine and Dye by Aglomerular and Glomerular Kidneys.

Abstract

Detailed anatomical studies were made preliminary to quantitative analyses of blood (plasma) and urine taken simultaneously from certain fish (teleosts). These studies establish definitely the character of the renal tubule and the blood supply to the kidney. In the aglomerular kidney, the blood supply is solely venous. In the glomerular kidney it is venous and arterial. Although arterial vascularization is apparently the necessary accompaniment of glomerular development, no definite relation obtains between the number of glomeruli developed and the number of tubules connected with them. All stages are found from no glomeruli to few or many. In 4 genera represented in 3 widely differing and unrelated families, the mesonephroi of which are (a) entirely aglomerular, (b) almost aglomerular, (c) predominantly glomerular, the blood and urine were analyzed for the commonly occurring constituents except uric acid and sulphates. The results of these analyses (analyses by Dr. Luigi Condorelli, Department of Clinica...