What is the function of a rbc'?

The primary function of red blood cells (RBCs), or erythrocytes, is to transport oxygen from the lungs to tissues throughout the body and carry carbon dioxide, a waste product of metabolism, back to the lungs for exhalation. They achieve this through the protein hemoglobin, which binds oxygen and facilitates its release in tissues. RBCs also help maintain blood pH and contribute to overall homeostasis.