Which component of blood is responsible for nutrient transport?

Plasma is the component of blood that is primarily responsible for the transport of nutrients throughout the body. It is a yellowish liquid that makes up about 55% of total blood volume and is composed mainly of water, but it also contains proteins, electrolytes, hormones, and waste products. Nutrients absorbed from the digestive system, such as glucose, amino acids, and vitamins, are dissolved in plasma and transported to cells, tissues, and organs where they are needed for various functions, including energy production and cellular repair.

Red blood cells, while essential for transporting oxygen and carbon dioxide, do not play a direct role in nutrient transport. White blood cells focus on immune response and defending the body against infections, and platelets are primarily involved in blood clotting rather than nutrient transport. Thus, plasma is uniquely qualified to carry a wide range of substances, making it the vital medium for nutrient distribution in the bloodstream.