Hemoglobin function

  • Hemoglobin, the oxygen-carrying component of RBCs, is composed of two pairs of protein chains called globin and four smaller units called heme, which contain iron. Iron binds and releases oxygen (O2).
  • Decreases in hemoglobin reduce the amount of O2 carried by the blood to cells. The oxygen-carrying capacity of hemoglobin can be affected by the formation of gases that can prevent O2 from reaching cells and by abnormalities of hemoglobin production and destruction.
Hemoglobin Molecule

Hemoglobin Molecule

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