Kidney Medulla. 0’5 µm Thick Section Stock Photography

Inner area of the renal medulla in cross section. 0.5 µm thick section of material embedded in plastic, stained with toluidine blue. There are two types of tubes that are difficult to distinguish between them. The first, the most abundant in the image, shows a relatively wide lumen and an extremely thin lining endothelium. They are capillaries and venules that, in the image, are empty of blood