Light micrograph of a renal artery. Two of the layers of the artery wall are visible: the intima (darker pink, central) and the media (top and bottom of the image) which is made up of individual smooth muscle cells. A singular neutrophil (small round and pink), one of the types of blood cells, is seen in the vessel lumen (central white space). PAS stained tissue section. Magnification: 200x when printed at 10cm.