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S.N. | Arteries | Veins |
1. | Arteries carry blood away from the heart and distribute to different body parts.
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Veins bring blood from different body parts back to the heart. |
2. | All arteries carry oxygenated blood except pulmonary arteries. | All veins except pulmonary veins carry deoxygenated blood. |
3. | The flow of blood is intermittent and fast due to the pumping action of the heart. | The flow of the blood is slow and steady. |
4. | The blood in arteries has considerable pressure. | The blood in veins has lower pressure. |
5. | They have thick elastic walls and narrow lumen. | They have thinner, scarcely elastic walls and wide lumen. |
6. | They are deeply seated. | They are superficial or surfacely located. |
7. | They have no valves in them. | They have muscular flaps called valves to prevent the back flow of blood and to counteract gravity. |
8. | They become empty after the death of the animal. | They contain blood even after the death of the animal. |
9. | Tunica media is thick, having more muscle fibers and elastic fibers. | Tunica media is thin, having fewer muscle fibers and elastic fibers. |
10. | In tunica interna, elastic membrane is thick and endothelial cells are more elongated. | In tunica interna, elastic membrane is thin and endothelial cells are less elongated. |