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What is the average lifespan of a red blood cell in humans?

Practice Questions

Q1
What is the average lifespan of a red blood cell in humans?
  1. 30 days
  2. 60 days
  3. 90 days
  4. 120 days

Questions & Step-by-Step Solutions

What is the average lifespan of a red blood cell in humans?
  • Step 1: Understand what a red blood cell is. It is a type of cell in the blood that carries oxygen.
  • Step 2: Learn that red blood cells are produced in the bone marrow.
  • Step 3: Find out that red blood cells have a limited lifespan.
  • Step 4: Research or recall that the average lifespan of a red blood cell is approximately 120 days.
  • Step 5: Conclude that after about 120 days, red blood cells are removed from the bloodstream and replaced by new ones.
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