State differences between the blood vessels-artery, vein and capillary

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Solution

ARTERY VEIN CAPILLARY
1. It is a blood vessel having a thick wall. 2. It is a blood vessel having thin wall. 3. It a very narrow blood vessel which has very thin walls.
2. It carries blood from the heart to different parts of the body. 2. It brings blood from different parts to the heart. 2. It forms a network throughout the body in all living cells connecting arteries to veins.
3. On regulatory demand of the body it can dilate or constrict. 3. It can't dilate or constrict under normal condition. 3. It can dilate or constrict according to the requirement of tissue.
4. It doesn't contain any valve. 4. It contains valves that allow the blood to flow in one direction towards the heart. 4. It doesn't have any valve.
5. All arteries carry oxygenated blood except pulmonary artery. 5. All veins carry deoxygenated blood except pulmonary vein. 5. It contains mixed blood as it connects arteries and veins.

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