Reference Terms
from Wikipedia, the free encyclopedia
Immune system
The immune system is the system of specialized cells and organs that protect an organism from outside biological influences. (Though in a broad sense, almost every organ has a protective function - for example, the tight seal of the skin or the acidic environment of the stomach.) When the immune system is functioning properly, it protects the body against bacteria and viral infections, destroying cancer cells and foreign substances.
Note: The above text is excerpted from the Wikipedia article "Immune system", which has been released under the GNU Free Documentation License.
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January 25, 2025
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