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    Question

    What is the typical lifespan of a human red blood cell

    (RBC)?
    A 60 days Correct Answer Incorrect Answer
    B 90 days Correct Answer Incorrect Answer
    C 120 days Correct Answer Incorrect Answer
    D 150 days Correct Answer Incorrect Answer

    Solution

    Under normal physiological conditions, human red blood cells (erythrocytes) circulate for approximately 120 days before being removed and recycled by the body's reticuloendothelial system.

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