Red blood cells carry oxygen from the lungs to every other organ, and blood-forming stem cells must make about 200 billion new red blood cells each day to keep the oxygen flowing. For many years, ...

Red blood cells transport oxygen throughout your body, including to vital organs and tissues. They also help your body get rid of carbon dioxide. Too little or too many red blood cells may be ...

This image shows an 'erythroblastic island,' a tiny factory where new red blood cells are made. The pink cells are developing red blood cells, which gather around a central blue-stained macrophage ...