A type of white blood cell that helps fight infection by surrounding and killing foreign cells or micro-organisms, removing dead cells and stimulating other immune system cells.
Macrophages develop from monocytes that have moved from the blood into tissues.
Macrophages are a type of phagocyte (a white blood cell that surrounds and kills bacteria or micro-organisms, eats foreign material, removes old or damaged cells and helps to boost the immune system).
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