Antigen
Antigen is the medical term meaning foreign substance.
An antigen is a substance that triggers an immune response in the body, by stimulating the production of antibodies. This response helps the body to recognize and destroy harmful pathogens such as bacteria, viruses, or foreign substances.
Immune System
An antigen is a substance that produces an immune response in the body, typically by binding to specific antibodies or activating immune cells. This immune response is essential for recognizing and eliminating foreign substances such as pathogens.
Foreign invaders have proteins called antigens that are recognized by the immune system as non-self. This recognition triggers an immune response to eliminate the invading pathogen.
Antigen
a toxin or other foreign substance that induces an immune response in the body, especially the production of antibodies.
A response of the body to an invasion of foreign substances is inflammation. The immune system will also produce more white blood cells and send them to the site of the infection.
Antigenan·ti·gen/ˈantijən/Noun:A toxin or other foreign substance that induces an immune response in the body, esp. the production of antibodies.
Lymphocytes
An antibody is a substance formed by the body in response to a perceived foreign substance. Antibodies are produced by the immune system to help identify and neutralize potentially harmful invaders, such as bacteria and viruses.
A foreign molecule is a substance that is not naturally produced or recognized by the body. When foreign molecules enter the body, the immune system may identify them as threats and initiate an immune response to protect the body from potential harm.