White blood cells play a vital role in the immune response by recognizing and attacking pathogens.
When a disease-causing agent enters an organism, the immune system alerts white blood cells. These specialized cells recognize pathogens as foreign invaders, can leave the blood to go to infected tissues, and play a crucial role in engulfing and destroying pathogens. Examples of white blood cells include monocytes that develop into macrophages, and mast cells that release chemicals in response to injury or allergies.
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