Blood Vessels: Veins & Valves

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Histological section of a vein stained with H&E, showing the lumen lined by endothelium. The tunica intima forms the innermost layer, followed by the tunica media composed of smooth muscle, and the outer tunica adventitia of connective tissue. A valve leaflet projects into the lumen, covered by endothelium. The image illustrates the layered structure of the vein wall and the presence of venous valves.
Histology Image
University of British Columbia, K. Pinder

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