Light micrograph of the layers of an artery. The artery lumen (white) is lined by an intimal layer (dark pink vertical band), an elastic layer (wavy pink vertical line), a muscular medial layer (pink area) and an outer adventitial layer (hot pink area at leftmost of image). Haematoxylin and eosin stained tissue section. Magnification: x100 when printed at 10cm.