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Blood is the motorway that delivers all the nutrients and oxygen to your cells that is required for growth and energy production. It also takes waste away from your cells to your kidneys/liver for excretion from your body preventing a toxic build up. Red cells main purpose is to deliver oxygen which is used in energy production, white cells fight infections and disease, platelets form what is called a platelet plug at a site of injury preventing you from bleeding to death from the smallest scratch and they also assist in the healing process and plasma is the liquid that carries all of these cells and nutrients.
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