Which type of blood cell is responsible for carrying oxygen to bodily tissues?

The erythrocyte, commonly known as a red blood cell, is the type of blood cell responsible for transporting oxygen throughout the body. Erythrocytes contain hemoglobin, a protein that binds to oxygen molecules in the lungs and carries them to tissues and organs requiring oxygen for metabolism. The structure of erythrocytes, being biconcave and flexible, allows them to navigate through the smallest blood vessels, facilitating efficient oxygen delivery.

Other cell types mentioned have different functions. Leukocytes, or white blood cells, are primarily involved in the immune response and defending the body against infections. Thrombocytes, or platelets, play a critical role in blood clotting and preventing bleeding. Glial cells, found in the nervous system, support and protect neurons but do not participate in the transport of oxygen or nutrients in the bloodstream. This highlights the unique and critical role that erythrocytes play in maintaining the body's overall health and function by ensuring that all tissues receive the necessary oxygen for energy production.