White blood cell

What is White blood cell?

White blood cell definition and meaning on Dictionary terms:
noun
any of various nearly colorless cells of the immune system that circulate mainly in the blood and lymph and participate in reactions to invading microorganisms or foreign particles, comprising the B cells, T cells, macrophages, monocytes, and granulocytes.

 

reference: https://www.dictionary.com/browse/white-blood-cell

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