Question

why does the number of WBC varies . (change of number )​

Answer 1

Answer:

In a person with normally functioning bone marrow, the numbers of white blood cells can double within hours if needed. An increase in the number of circulating leukocytes is rarely due to an increase in all five types of leukocytes. When this occurs, it is most often due to dehydration and hemoconcentration.

Explanation:

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Answer 2

Answer:

white blood cells

Explanation:

actually WBC life span is about 1 week which is very less than comparative to others. To protect Or develop the immune system it destroy the infection. on the basis of infection it varies ex : if we felt from fever the WBC no.will less as compare to our healthy body.