Multiple choice

What's the lifespan of a human red blood cell?

  1. 3 days

  2. 120 days

  3. 4 hours

  4. 5 years
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A healthy human red blood cell lives for approximately 120 days before being recycled by the spleen and liver. The other options are biologically inaccurate.

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