Artery | Vein |
1. Direction of blood flow is from heart to other body parts | Direction of blood flow is from body parts to heart |
2. Carries oxygenated (pure) blood (except in pulmonary artery) | Carries deoxygenated (impure) blood (except in pulmonary vein) |
3. Blood flows in high pressure and speed | Blood flows in low pressure and speed |
4. Thicker and more elastic wall | Thinner and less elastic |
5. Narrow lumen | Wide lumen |
6. Deep seated in position | Generally found superficial in position |
7. Valves are absent | Present |
8. Tunica interna (innermost layer) is more developed and elastic. Elongated endothelial cells are present in this layer | Tunica interna is less developed and elastic. Endothelial cells are less flat |
9. Tunica media (middle layer) is more muscular with many elastic fibres | Tunica media is less muscular with few elastic fibres |
10. Tunica externa (outermost layer) is less developed so less strong | Tunica externa is more developed so more strong |
11. After death, arteries become empty | After death, veins will contain blood |
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