test 3 blood and lymphatic system immunity
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5 terms
Terms | Definitions |
|---|---|
 immunity | process of disease protection induced by exposure to an antigen |
| antigen | a substance that, when introduced into the body, causes the formation of antibodies against it |
| antibody | a substance produced by the body that destroys or inactivates an antigen that has entered the body |
| active immunity | a long lasting immunity that results from stimulating the body to produce its own antibodies; developed either naturally, in response to an infection, or artificially, in response to the administration of a vaccine |
| passive immunity | a shot lasting immunity that results foreign antibodies that are conveyed either naturally, through the placenta to a fetus, or artificially, by injecting of a serum containing antibodies |
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