About 55% of the volume of the human blood is?
Correct answer: A. Plasma
- A. Plasma
- B. Blood proteins
- C. Blood cells
- D. Both B and C
Explanation
Plasma constitutes 55% of total blood volume. Composed of 90% water, salts, lipids and hormones, it is especially rich in proteins (including its main protein albumin), immunoglobulins, clotting factors and fibrinogen.
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