What is the primary function of red blood cells?

Red blood cells, also known as erythrocytes, have the primary function of transporting oxygen from the lungs to the tissues and organs throughout the body. They contain a protein called hemoglobin, which binds to oxygen molecules in the lungs and carries them via the bloodstream. This process is crucial for providing the necessary oxygen for cellular respiration, which is how cells produce energy.

The ability of red blood cells to deliver oxygen is essential for maintaining health and supporting vital bodily functions. Without sufficient oxygen transport, cells would not be able to perform their roles effectively, leading to fatigue and various health issues. Furthermore, red blood cells also help in the transportation of carbon dioxide, a waste product of metabolism, back to the lungs where it can be exhaled. This dual function emphasizes their importance in the respiratory and circulatory systems.