Which component of blood is primarily responsible for oxygen transport?

Red blood cells are the primary component of blood responsible for oxygen transport. They contain a protein called hemoglobin, which has a high affinity for oxygen. When red blood cells pass through the lungs, hemoglobin binds to oxygen molecules, allowing them to be transported throughout the body. Once in the tissues, hemoglobin releases the oxygen, which is then utilized by cells for metabolic processes.

Other components of blood, such as white blood cells, plasma, and platelets, serve different functions. White blood cells are part of the immune system and help defend against infections. Plasma is the liquid portion of blood that carries nutrients, hormones, and waste products but does not have a direct role in oxygen transport. Platelets are involved in blood clotting and also do not contribute to oxygen transportation. Thus, red blood cells play a crucial and distinct role in the process of delivering oxygen to body tissues.