Multiple choice

The life span of RBC is _________.

  1. 120 days

  2. 70 days

  3. 60 days

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The cells develop in the bone marrow and circulate for about 100-120 days in the body before their components are recycled by macrophages. Each circulation takes about 20 seconds. Approximately a quarter of the cells in the human body are red blood cells.

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