Immune System Key Vocabulary

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Disease

Back

Any change, other than an injury, that disrupts the normal functions of the body

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Antibody

Back

A protein produced by the body's immune system when it detects harmful substances, called antigens.

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Antigen

Back

Any substance that causes your immune system to produce antibodies against it.

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Immune System

Back

The body's defense against infectious organisms and other invaders.

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Pathogen

Back

A bacterium, virus, or other microorganism that can cause disease.

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Vaccine

Back

A substance used to stimulate the production of antibodies and provide immunity against one or several diseases.

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Antibiotic

Back

A type of medicine that inhibits the growth of or destroys bacteria.

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Antibiotic Resistance

Back

The ability of bacteria and other microorganisms to resist/survive the effects of an antibiotic to which they were once sensitive.

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Immunity

Back

The ability of an organism to resist a particular infection by the action of specific antibodies.

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Allergy

Back

A condition in which the immune system reacts abnormally to a harmless foreign substance.