The lifespan of White Blood Cells is ……. day(s)? A) 1 – 5 days B) 3 – 7 days C) 4 – 8 days D) 5 – 21 day Related MCQs: The lifespan of Red Blood Cells is …… days? The lifespan of Red Blood cells is —–days The blood vessels that take oxygenated blood from the heart to the body are called? The Life of red blood cells is: