Which of the following cells has a lifespan of 5-9 days?

WBC

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Platelets

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RBC

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None of the above

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Solution

The correct option is B Platelets
The platelets are formed by fragmenting from cells found in bone marrow called as megakaryocytes, and similar to red blood cells, they do not have a nucleus. The average lifespan of a platelet is normally just 5 to 9 days.
Therefore, the correct answer is option B.

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