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Immune System

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The body's defense system against infections and diseases.

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White Blood Cell

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A type of blood cell that is part of the immune system and helps fight infections.

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Nonspecific Immunity

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The first line of defense against pathogens, providing general protection.

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Specific Immunity

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The immune system's targeted response to a specific pathogen.

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T Cell

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A type of lymphocyte that plays a central role in cell-mediated immunity.

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B Cell

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A type of lymphocyte that produces antibodies to fight infections.

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Antibody

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A protein produced by B cells that recognizes and neutralizes pathogens.

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Antigen

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A substance that triggers an immune response, often a part of a pathogen.

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Memory Cell

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A long-lived immune cell that remembers past infections and responds quickly upon re-exposure.

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Immunity

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The ability of the body to resist a particular infection or toxin.