What is the function of red blood cells?

The main function of red blood cells, also known as erythrocytes, is to transport oxygen from the lungs to the rest of the body tissues and to carry carbon dioxide back to the lungs to be exhaled. This is achieved through the presence of hemoglobin, a protein that binds to oxygen and carbon dioxide. Red blood cells also help maintain the body's pH balance and regulate blood pressure.

The primary function of red blood cells, also known as erythrocytes, is to transport oxygen throughout the body. They contain a protein called hemoglobin, which binds to oxygen molecules in the lungs and carries them through the bloodstream to tissues and organs. Red blood cells also remove carbon dioxide, a waste product produced by cellular respiration, from tissues and transport it back to the lungs for exhalation.