Red blood cells (erythrocytes) are one of three main components in your blood, along with white blood cells and platelets. Produced by your bone marrow, red blood cells play a key role in ...

There are four components - or parts - of the blood: red blood cells, white blood cells, plasma and platelets. Blood carries things you need, like oxygen and glucose, and waste products ...

This common blood test measures different components of your blood, including hemoglobin (a protein in red blood cells that carries oxygen), platelets (which help with blood clotting), and red and ...