Plasma: 55% of blood's total volume, delivers oxygen, hormones and nutrients to cells, 92% is water, Red Blood Cells: 40% of body's total volume, hemoglobin changes color depending on whether or not oxygen is in them, White Blood Cells: 3% of body's blood volume, provides protection against viruses, largest blood cell, but there are not as many of them in the blood, Platelets: 2% of body's blood volume, smallest blood cell, "clean up crew", contains fibrins, which are the scab making fibers that form clots,

Blood Makeup

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