Which component makes up the majority of blood volume?

Which component makes up the majority of blood volume?

• A. Plasma
• B. Red blood cells
• C. White blood cells
• D. Platelets

Answer: (A)

Blood volume is divided into a liquid part and the cellular elements. The liquid portion, plasma, makes up about 55% of total blood volume, while the formed elements (red blood cells, white blood cells, and platelets) account for roughly 45%. Because of this distribution, the majority of blood volume is plasma. Plasma is mostly water and contains proteins like albumin, antibodies, clotting factors, electrolytes, nutrients, and wastes, which together transport and regulate substances throughout the body. Red blood cells are the largest single group of cells, but they still occupy a smaller share of total blood volume than plasma, since the latter is the dominant liquid component.

Blood volume is divided into a liquid part and the cellular elements. The liquid portion, plasma, makes up about 55% of total blood volume, while the formed elements (red blood cells, white blood cells, and platelets) account for roughly 45%. Because of this distribution, the majority of blood volume is plasma. Plasma is mostly water and contains proteins like albumin, antibodies, clotting factors, electrolytes, nutrients, and wastes, which together transport and regulate substances throughout the body. Red blood cells are the largest single group of cells, but they still occupy a smaller share of total blood volume than plasma, since the latter is the dominant liquid component.