why blood is needed by all parts of an animal???
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Blood is needed by all the parts of the body because: (i)It carries oxygen to all the parts of the body and also carries carbon dioxide back to the lungs. (ii) It carries digested food to various parts of the body for absorption. (iii) It contains platelets which help in the clotting of blood.
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Blood is a carrier of all the requirements of a cell. It carries oxygen , glucose and other important substances needed by living cells. It also removes waste products like carbon dioxide from the cell. If not removed these wastes will get accumulated and become toxic. Hence all living cells require supply of blood.
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