What percentage of whole blood is composed of plasma?

Plasma constitutes approximately 55% of whole blood. This liquid portion of the blood serves several key functions, including transporting nutrients, hormones, and proteins to the parts of the body that need them. Plasma also plays a crucial role in maintaining blood pressure and regulating body temperature. The composition of blood is generally categorized into two main parts: the cellular components, which include red blood cells, white blood cells, and platelets, and the plasma, which is the liquid that carries these cells. The ratio of plasma to cellular components is essential for understanding blood function and its various roles in the circulatory system.