What is the primary function of red blood cells?

The primary function of red blood cells is to carry oxygen to the body’s tissues. These cells contain a protein called hemoglobin, which binds to oxygen in the lungs, allowing it to be transported through the bloodstream to various tissues and organs throughout the body. This oxygenation process is crucial for cellular respiration, which provides the energy needed for cells to function effectively.

While red blood cells are not primarily involved in fighting infections, regulating body temperature, or transporting nutrients, those roles are fulfilled by other components of the circulatory and immune systems. White blood cells handle immune responses to infections, the body relies on mechanisms like perspiration and blood flow adjustments to regulate temperature, and nutrients are transported by the plasma component of blood. Understanding the distinct roles of these various blood components highlights the specialized function of red blood cells.