Life cycle of RBC is_______________?
Correct answer: C. 120 days
- A. 12 days
- B. 90 days
- C. 120 days
- D. One month
Explanation
Red blood cells circulate for about 120 days before aged cells are removed mainly by macrophages in the spleen, liver and bone marrow. Their membrane becomes progressively less flexible during this lifespan.
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