What is hemoglobin?
Hemoglobin (sometimes abbreviated as Hb) is complex protein found in red
blood cells that contains an iron molecule. The main function of hemoglobin is
to carry oxygen from the lungs to the body tissues, and to exchange the oxygen
for carbon dioxide, and then carry the carbon monoxide back to the lungs and
where it is exchanged for oxygen. The iron molecule in hemoglobin helps maintain the normal shape
of red blood cells.
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