Which component makes up about 55% of blood, mainly water and proteins?

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Multiple Choice

Which component makes up about 55% of blood, mainly water and proteins?

Plasma is the fluid part of blood, making up about 55% of its volume. It is predominantly water and contains dissolved proteins such as albumin, globulins, and fibrinogen. This liquid medium carries nutrients, hormones, and waste products throughout the body and helps maintain blood volume and pressure. The protein components also support clotting and immune functions. The rest of blood’s components—red blood cells, white blood cells, and platelets—are the cells suspended in plasma, responsible for oxygen transport, immune defense, and clotting.

Plasma is the fluid part of blood, making up about 55% of its volume. It is predominantly water and contains dissolved proteins such as albumin, globulins, and fibrinogen. This liquid medium carries nutrients, hormones, and waste products throughout the body and helps maintain blood volume and pressure. The protein components also support clotting and immune functions. The rest of blood’s components—red blood cells, white blood cells, and platelets—are the cells suspended in plasma, responsible for oxygen transport, immune defense, and clotting.

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