A protein in red blood cells that carries oxygen from the lungs to all parts of your body.
From Greek haima (blood) + Latin globus (sphere), coined in the 1860s. Scientists named it for its globe-like shape and its role as the blood's oxygen carrier.
Your hemoglobin molecules are recycled about every 120 days, but each iron atom inside them can be reused thousands of times—your body is incredibly efficient at conserving this crucial element for survival.
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