By: Jacob Scandalis
Function of the Immune System
Pathogens, Active Immunity, Passive Immunity, Antigens, and Antibody.
Active immunity - the immunity that results from the production of antibodies by the immune system in response to the presence of an antigen.
Passive immunity - the short term immunity that results from the inroduction of antibodies from another person or animal.
Antigen - a toxin or other foreign substance that induces an immune response in the body, especially the production of antibodies.
Antibody - a blood protein produced in response to and counteracting a specific antigen. Antibodies combine chemically with substances that the body recognizes as alien, such has bacteria, viruses, and foreign substances in the blood.