Answer :

Hemoglobin is a molecule that attaches to erythrocytes and carries oxygen.

The majority of the blood's cells are erythrocytes. Due to their flexibility, they can freely move across capillaries, carrying carbon dioxide to the lungs and supplying oxygen to tissues. The most prevalent protein in erythrocytes is hemoglobin (Hb), which serves as the body's principal oxygen carrier.

Red blood cells include a protein called hemoglobin, which consists of four subunits: two alpha, two beta, and an iron-containing heme group. This heme group easily bonds to oxygen. As more oxygen molecules are bonded to heme, the oxygen's ability to bind rises. Oxygen's ability to bind to hemoglobin and to dissociate from it can be affected by disease states and other physiological changes.

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