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White blood cells are very important blood cells. they protect our health from harmful bacteria ,germs etc.the white blood cells are also known as policeman of our body,leukocytes.this normal wbc count in our body is 4*11x10%.while functioning the cells of it expands to 4,000-11,000 per microliter of blood.they will make up approximately 1% of the total blood volume of the blood .there are five different types of leukocytes exists.neutrophil,monocytes,eosinophils,basophils and lymphocytes.
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