The thin layer of white blood cells and platelets found above the packed red cells in centrifuged blood is called the

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The thin layer of white blood cells and platelets found above the packed red cells in centrifuged blood is called the buffy coat. A is incorrect because the hematocrit refers specifically to the percentage of total blood volume occupied by red blood cells. B is incorrect because plasma is the clear, straw-colored liquid that makes up about 55% of blood volume and contains proteins, hormones, nutrients, and waste products. C is incorrect because serum is the liquid that remains after blood clots and contains all of the components of plasma except for the clotting factors. E is incorrect because there is no extracellular matrix in blood.

The Thin Layer of White Blood Cells and Platelets Found