What is the lifespan of RBCs?

120

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240

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As long as the organism lives

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RBCs never die

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Solution

The correct option is A
120

Human red blood cells are formed mainly in the bone marrow and are believed to have an average lifespan of approximately 120 days after which they are replaced. Because they wear out so quickly, an entire supply of red blood cells is renewed every four months.

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