Which blood component is primarily responsible for oxygen transport?

Red blood cells are primarily responsible for oxygen transport in the body. These cells contain hemoglobin, a protein that binds to oxygen in the lungs and carries it through the bloodstream to the tissues and organs. The structure of red blood cells, which are biconcave in shape, provides a large surface area for gas exchange and allows them to efficiently pick up oxygen and deliver it where it is needed.

In contrast, platelets play a crucial role in blood clotting and wound healing, while white blood cells are part of the immune system and help protect the body against infections. Plasma, the liquid component of blood, primarily serves as a medium for transporting nutrients, hormones, and waste products, but it does not transport oxygen directly. Thus, red blood cells are essential for the process of delivering oxygen throughout the body, making them the key component for oxygen transport.