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Question

Which blood constituent makes up more of the volume of blood?

A
Red blood cells
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B
Plasma
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C
Blood proteins
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D
White blood cells
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Solution

The correct option is C Plasma
Blood is composed of two elements- plasma and blood cells. Blood plasma constitutes 55% of the total blood volume while blood cells (RBC, WBC and platelets) constitute 45% of the total blood volume. Plasma is the liquid component of blood.
Hence the correct option is B.

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