Blood Transfusions
Foundations
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Blood is a specialized circulating connective tissue containing cells suspended in plasma. In a normal sized human, the total blood volume is about 5 litres. The blood cells, or formed elements, which represent approximately 45% of the blood volume, are the RBCs, WBCs and platelets. The remaining 55% of the blood volume is the plasma, which is an aqueous solution containing a number of proteins, including the coagulation factors. | |
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