How Lungs Back Up Bone Marrow to Make Blood
Red blood cells carry oxygen from lungs to every organ, and blood-forming stem cells make 200 billion new red blood cells daily to keep oxygen flowing.
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, scientists assumed that blood production took place in the bone marrow. But now, researchers are showing it's also happening in the lungs.