Artery | Vein |
Arteries carry blood away from the heart to the tissues of the body. Arteries carry oxygenated blood except for pulmonary artery. | Veins carry blood from the tissues of the body back to the heart. Veins carry deoxygenated blood except for pulmonary vein. |
Arteries have thick elastic muscular walls. Valves are absent. | Veins have thin non-elastic less muscular walls. Valves are present. |
These possess a narrow lumen. | These possess wide lumen. |