Which type of blood cell is responsible for transporting oxygen in the body?

Red blood cells are responsible for transporting oxygen in the body. These cells contain hemoglobin, a protein that binds to oxygen in the lungs and carries it through the bloodstream to various tissues and organs. The high surface area of red blood cells, which are uniquely shaped like biconcave discs, allows for efficient gas exchange. Their primary function is to ensure that oxygen reaches all parts of the body for cellular respiration, which is essential for energy production in cells.

In contrast, white blood cells are primarily involved in the immune response, defending the body against infections. Platelets play a crucial role in blood clotting, helping to prevent bleeding when injuries occur. Plasma cells are a type of white blood cell that produces antibodies, vital for the immune system, but they do not have a role in gas transport.