Back Immuunstelsel Afrikaans Immunsystem ALS Sistema immunitario AN جهاز مناعي Arabic جهاز مناعى ARZ প্ৰতিৰোধ তন্ত্ৰ Assamese Sistema inmunitariu AST İmmun sistemi Azerbaijani باغیشیقلیق سیستمی AZB Иммунлыҡ системаһы Bashkir
The immune system is the set of tissues which work together to resist infections. The immune mechanisms help an organism identify a pathogen, and neutralize its threat.[1]
The immune system can detect and identify many different kinds of disease agents. Examples are viruses, bacteria and parasites. The immune system can detect a difference between the body's own healthy cells or tissues, and 'foreign' cells. Detecting an unhealthy intruder is complicated, because intruders can evolve and adapt so that the immune system will no longer detect them.
Once a foreign cell or protein is detected, the immune system creates antibodies to fight the intruders, and sends special cells ('phagocytes') to eat them up.
- ↑ Janeway C.A et al 2001. Basic concepts in immunology, Chapter 1 in Immunobiology, 5th ed, New York: Garland Science. ISBN 978-0-8153-4101-7
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