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(1) Fluid through which cellular components of blood, lymph, or intramuscular fluid are suspended.

(2) (medicine) Acellular, sterilized blood plasma that is used for transfusion.


Plasma is the yellowish fluid in blood that makes up the 55% of the total blood volume. It consists of dissolved proteins, glucose, clotting factors, mineral ions, hormones and carbon dioxide. In the body, plasma serves as a medium to transport essential substances in blood.

Word origin: from Greek, from plassein, to mold

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