Loop of Henle
Loop of Henle

Loop of Henle

Periodic acid-Schiff Staining (PAS). The thick descending limbs of the loop of Henle look similar to the proximal tubule, with apical brush borders. The thick ascending limbs are composed of cuboidal cells, but unlike the proximal convoluted tubule, they do not have apical brush borders. Collecting ducts can also be seen on this slide. They can be easily distinguished by the presence of prominent lateral borders between adjacent cells.