How your immune system works

Help with Listen Feature Help with Listen Feature

Inside your body there is an amazing protection mechanism called the immune system. It is designed to defend you against millions of bacteria, microbes, viruses, toxins and parasites that would love to invade your body. The immune system, however, can become weakened, compromised, or malfunctioning. Health problems can arise, then. To learn more about how the immune system operates, visit this interactive page on “how stuff works.” (posted January 31, 2013)


NOTICE: The National Dissemination Center for Children with Disabilities (NICHCY) is no longer in operation. Our funding from the U.S. Department of Education’s Office of Special Education Programs (OSEP) ended on September 30, 2013. Our website and all its free resources will remain available until September 30, 2014.