Medicine: Vital Fractions

Blood is full of a number of things. There are the red cells, which contain oxygen-carrying hemoglobin and are used in transfusions for anemia.There are white cells, which rush to defend the system against bacterial invasion. There are the little-understood platelets, which help in clotting. Besides these solids, there is the amber fluid (plasma), which contains a score or more different components, some already being used in medicine, others still in the research stage. To separate these various fractions, preserve them and make them available for medical use is a vastly complex process.

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