The life span of human WBC is approximately

Options

A. Less than `10` days
B. Between `20` to `30` days
C. Between `2` to `3` months
D. More than `4` months

Answer

A

Explanation

The life span of granulocytes once released from the bone marrow is normally `4-8` hours circulating in the blood and another `4` to `5` days in the tissue. The monocyte also have life spans of few