NERDS GONE WILD

The average lifespan of a human red blood cell is 120 days. Short career, critical impact.

✓ TRUE FACT

Red blood cells circulate for about 4 months before being broken down, mainly in the spleen and liver. Your bone marrow replaces them continuously—making millions per second in a healthy adult.

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The average lifespan of a human red blood cell is 120 days. Short career, critical impact. | SmartAss Facts