Which type of blood cell is responsible for oxygen transport?

Erythrocytes, commonly known as red blood cells, are specifically designed for the transport of oxygen throughout the body. Their unique biconcave shape increases the surface area available for gas exchange, allowing for efficient absorption and release of oxygen. Erythrocytes contain hemoglobin, a protein that binds to oxygen in the lungs and carries it to tissues where it is released. This function is vital for sustaining cellular metabolism and overall body function.

In contrast, leukocytes, or white blood cells, play a key role in the immune system, defending the body against infections and foreign substances. Thrombocytes, or platelets, are primarily involved in blood clotting to prevent excessive bleeding when injuries occur. Plasma cells are a type of white blood cell that produces antibodies; they are not involved in oxygen transport but rather in the immune response. Understanding these distinct roles of blood components clarifies the crucial function of erythrocytes in oxygen transport.