Immune System - A system functioned to protect your body from pathogens, White blood cell - a category of cell that kills pathogen, Microphages - A kind of white blood cell that engulf and digests pathogen, Killer T cell - destroy cells infected with viruses. One of the three main types of cells developed in your thymus., Memory B cell - Memorize the proteins on the pathogen to be ready for next time's same pathogen attack, B cell - produce antibodies,

Immune system

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