What is the main function of plasma in the blood?

The main function of plasma in the blood is to transport various substances throughout the body. Plasma is the liquid component of blood that makes up about 55% of its volume. It is primarily composed of water, but also contains salts, enzymes, antibodies, nutrients, hormones, and waste products.

By serving as a transport medium, plasma facilitates the movement of essential substances like glucose, amino acids, electrolytes, and gases (such as carbon dioxide and oxygen) between different cells and organs. This is crucial for maintaining homeostasis and ensuring that cells receive the materials they need for energy production and other metabolic processes.

While other components in blood serve specific roles—such as platelets which are involved in clotting or white blood cells that help in immune responses—the primary function of plasma is its extensive transport capabilities. This is fundamental for the overall functioning of the circulatory system and the health of the organism.