what is hemoglobin.
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Hemoglobin is a protein in your red blood cells that carries oxygen to your body's organs and tissues and transports carbon dioxide from your organs and tissues back to your lungs. If a hemoglobin test reveals that your hemoglobin level is lower than normal, it means you have a low red blood cell count (anemia).
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Explanation:
a red substance in the blood that carries the gas we need to live (oxygen) and contains iron
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