Erythrocyte physiology · Physiology

The primary function of erythrocytes is to:

  1. Defend the body against invading infections
  2. Transport oxygen and carbon dioxide
  3. Regulate the process of blood clotting
  4. Maintain long-term immune memory
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Correct answer: Transport oxygen and carbon dioxide

Erythrocytes transport oxygen from the lungs to tissues and carbon dioxide from tissues to the lungs. This function is mediated by hemoglobin.

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