define and write functions of arteries,veins,capillaries
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•Veins: every blood vessel flowing from the organs towards the heart
•Capillary: smallest blood vessels located in the organs etc.. This is the part where the exchange happens between actual cells and the blood. Oxygen and nutrients, from the arteries, go into the cells and toxins get out of the cell and get transferred by the veins.
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veins carry blood from different parts of the body to the heart.
Capillaries are the smallest of blood vessels. They serve to distribute oxygenated blood from arteries to the tissues of the body and to feed deoxygenated blood from the tissues back into the veins.
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