ANTIGEN
Antigen
The antigen may originate from within the body or from the external environment. "Self" antigens are usually well tolerated by the immune system, which has been educated to non-reactivity against the structures present inside the body under the physiological conditions. "Non-self" antigens can be identified as invaders from the outside world or modified/harmful substances present under the distressed conditions in the body and only these are supposed to be attacked by the immune system. In other words, the immune system will try to destroy or neutralize any antigen that has been recognized as a foreign substance and /or signal of harmed tissues. In sympathy ...The above text is a snippet from Wikipedia: Antigen
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antigen
Noun
- A substance that induces an immune response, usually foreign.
The above text is a snippet from Wiktionary: antigen
and as such is available under the Creative Commons Attribution/Share-Alike License.