Which blood component is primarily responsible for oxygen transport?

Red blood cells are primarily responsible for transporting oxygen throughout the body. They contain a protein called hemoglobin, which binds to oxygen in the lungs and carries it to tissues and organs where it is needed. This oxygen transport capability is crucial for cellular respiration and energy production.

While plasma does carry nutrients, hormones, and waste products, it does not play a direct role in oxygen transport. White blood cells are primarily involved in the immune response and protecting the body against infections. Platelets are essential for blood clotting and preventing excessive bleeding, but they do not transport oxygen. Thus, red blood cells' unique structure and function make them the key players in oxygen transportation.