Immune System

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Last updated 11:56 AM on 9/28/26
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5 Terms

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Pathogen

A disease-causing organism such as a bacterium, virus, fungus, or parasite

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Antigen

A molecule the immune system recognizes as foreign

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Antibody

A protein made by the immune system that binds to a specific antigen to help destroy or neutralize it

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Lymph node

A small bean-shaped structure that filters lymph and contains immune cells that fight infection

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Autoimmune

A condition in which the immune system attacks the body's own healthy cells or tissues