| A | B |
|---|
| pathogen | organism that causes disease |
| infectious disease | disease that can pass from one organism to another |
| toxin | poison that damages cells |
| inflammatory response | white blood cells destroy pathogens |
| phagocyte | type of white blood cell |
| immune response | body's defense against pathogens |
| lymphocyte | type of white blood cell targets specific pathogens |
| T cell | lymphocyte that identifies pathogens |
| antigen | molecule on a cell that immune system can recognize |
| B cell | lympocyte that destroys specific pathogens |
| antibody | B cell chemical |
| AIDS | immune system disease |
| immunity | ability of immune system to destroy pathogens |
| active immunity | person's own immune system produces antibodies |
| vaccination | harmless antigens introduced into body |
| vaccine | substance of weak or killed pathogens |
| passive immunity | antibodies come from another organism |
| antibiotic | chemical that kills or slows bacteria |
| allergy | immune system sensitive to foreign substance |
| histamine | chemical responsible for symptoms of an allergy |
| noninfectious disease | can't spread from person to person |
| allergen | substance that causes an allergy |
| asthma | narrowing of respiratory passages |
| insulin | chemical produced by the pancreas |
| diabetes | pancreas fails to produce insulin or body's cells can't use it properly |
| tumor | abnormal tissue mass |
| carcinogen | substance that can cause cancer |
