Which blood cells are responsible for carrying oxygen throughout the body?

Red blood cells, or erythrocytes, are specifically designed to transport oxygen from the lungs to various tissues and organs throughout the body. They contain a protein called hemoglobin, which binds to oxygen molecules, allowing these cells to effectively carry and deliver oxygen. This process is crucial for cellular respiration, which generates energy required by the body's cells.

The other components listed play different roles in the overall function of blood. For instance, white blood cells are primarily involved in the immune response, defending the body against infections. Blood plasma is the liquid portion of blood that carries nutrients, hormones, and waste products, but it does not carry oxygen directly. Platelets play a key role in blood clotting and preventing excessive bleeding, but they are not involved in oxygen transport.