alleryThe lifespan of a human red blood cell (erythrocyte) is approximately:
A60 days (about two months)
B120 days (about four months)
C240 days (about eight months)
D360 days (about one year)
Answer & Solution
Correct answer: B. 120 days (about four months)
RBCs live ~120 days in circulation.
They are produced in bone marrow (haematopoiesis) and destroyed in the spleen at end of life.
Keep practising Unit 8G: Comparative Physiology: Circulation, Respiration & Gas Exchange
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