Kidney medulla with collecting ducts.

In a longitudinal section, the cuboidal nature of the cells in the collecrting duct is quite obvious. The other features are: light or clear cytoplasm and distinct lateral cell walls. In a tangential section of the duct, the cell boundaries are even more prominent. Profiles of the vasa recta with plasma protein are also present. Original mag. 132x PAS-Hematoxylin. Kidney medulla. Urinary System. Cat