What is the immune system?

Asked by arwen46 12 years ago 3/20/2013 2:18 AM

Last updated by anonymous 12 years ago 3/21/2013 12:20 AM

Answered by anonymous 12 years ago 3/21/2013 12:20 AM

The body system which fights off threats ("germs", foriegn life forms, bacteria, ect)

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