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Immune system and related vocabulary

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Term
Definition
immune system   complex group of defenses that protects the body against pathogens--includes the skin and respiratory, digestive, and circulatory systems  
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antigen   any complex molecule that is foreign to your body  
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antibody   a protein made in response to a specific antigen that can attach to the antigen and cause it to be useless  
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active immunity   long-lasting immunity that results when the body makes its own antibodies in response to a specific antigen  
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passive immunity   immunity that results when antibodies that are produced in one animal are introduced into another's body; does not last as long as active immunity  
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vaccination   process of giving a vaccine by mouth or by injection to provide active immunity against a disease  
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pasteurization   process in which a liquid is heated to a temperature that kills most bacteria  
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virus   a strand of hereditary material surrounded by a protein coating that can infect and multiply in a host cell  
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infectious disease   disease caused by a virus,bacterium, fungus, or protist that is spread from an infected organism or the environment to another organism  
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biological vector   disease carrying-organism that carries a disease, such as a rat, mosquito, or fly, that spreads a disease  
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sexually transmitted disease (STD)   infectious disease, such as chlamydia, AIDS, or genital herpes, that is passed from one person to another during sexual contact  
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noninfectious disease   disease, such as cancer, diabetes, or asthma, that is not spread from one person to another  
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allergy   overly strong reaction of the immune system to a foreign substance  
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allergen   substance that causes an allergic reaction  
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chemotherapy   use of chemicals to destroy cancer cells  
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Created by: MsHollinger
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