Moderate

The average life span of red blood cell is about:

Correct answer: A. 4 months

  • A. 4 months
  • B. 2 months
  • C. 5 months
  • D. 1 month

Explanation

The average lifespan of a Red Blood Cell lasts 110-120 days, when they are destroyed by macrophages.

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About Circulation

The circulatory system covers the chambers, valves and conducting pathway of the human heart, along with the cardiac cycle and control of heartbeat. It compares arteries, veins and capillaries by structure and function, and explains how the lymphatic system returns tissue fluid, transports absorbed fats and supports immunity.

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