What percentage of blood is made up of plasma?

Blood is composed of several components, and plasma is one of the primary constituents. Plasma typically makes up about 55% of total blood volume. It is a yellowish liquid that serves as the medium for transport of nutrients, hormones, and waste products. In addition to water, plasma contains proteins, electrolytes, gases, and various metabolites.

Understanding the component ratios of blood is important for various physiological processes and clinical assessments. For instance, knowing that plasma constitutes 55% of blood can help in understanding fluid balance, the delivery of substances throughout the body, and the body's response to conditions such as dehydration or blood loss.