"The immune system is a network of organs, cells and molecules that work together to defend the body against attacks by foreign (not of the body) invaders such as germs, bacteria, viruses, parasites and fungi."
The Immune system works kind of like a factory. It is like a factory, that is made up of organs, cells, and molecules that collaborate to protect the body against bad things coming into the body, such as germs, bacteria, viruses, parasites, and fungi.
Autoimmune diseases and disorders- symptoms, treatment, and prevention. (2010). Retrieved from http://www.healthscout.com/ency/68/487/main.html
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