Differentiate between arteries, veins and capillaries.

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Solution

Differentiation between arteries, veins and capillaries:
Artery Vein Capillary
It is a blood vessel having a thick wall. It is a blood vessel having a thin wall. It is a very narrow blood vessel that has very thin walls.
It carries blood from the heart to different parts of the body. It brings blood from different parts of the body to the heart. It forms a network throughout the body in all living cells connecting arteries to veins.
It doesn't contain any valve. It contains valves that allow the blood to flow in one direction towards the heart. It doesn't have any valve.
All arteries carry oxygenated blood except the pulmonary artery. All veins carry deoxygenated blood except the pulmonary vein. As the capillaries are much thinner so, the artery becomes arterioles and the vein becomes venules when they need to exchange substances with the cells.

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Artery	Vein	Capillary
It is a blood vessel having a thick wall.	It is a blood vessel having a thin wall.	It is a very narrow blood vessel that has very thin walls.
It carries blood from the heart to different parts of the body.	It brings blood from different parts of the body to the heart.	It forms a network throughout the body in all living cells connecting arteries to veins.
It doesn't contain any valve.	It contains valves that allow the blood to flow in one direction towards the heart.	It doesn't have any valve.
All arteries carry oxygenated blood except the pulmonary artery.	All veins carry deoxygenated blood except the pulmonary vein.	As the capillaries are much thinner so, the artery becomes arterioles and the vein becomes venules when they need to exchange substances with the cells.