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. To understand the p...
http://www.howstuffworks.com/immune-system.htm
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Immune system - Wikipedia, the free encyclopedia
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An immune system is a system of biological structures and processes within an organism that protects against disease by identifying and killing pathogens and tumour cells. It detects a wide variety ...
en.wikipedia.org/wiki/Immune_system
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The immune system is made up of special cells, proteins, tissues, and organs that defend people against germs and microorganisms. It's the body's defense against disease. ... What the Immune System Does...
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kidshealth.org/parent/general/body_basics/immune.html
kidshealth.org/parent/general/body_basics/immune.html
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The immune (pronounced: ih-myoon) system, which is made up of special cells, proteins, tissues, and organs, defends people against germs and microorganisms every day. In most cases, the immune system does a great job of keeping people healt...
http://kidshealth.org/teen/your_body/body_basics/immune...
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When your body encounters a germ, its first line of defense is your immune system. Specialized cells and organs help your body recognize and respond to foreign invaders. Your immune system even has its own circulatory system, called the lymphatic system.
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www.nlm.nih.gov/medlineplus/immunesystemanddisorders.ht...
www.nlm.nih.gov/medlineplus/immunesystemanddisorders.html
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The immune system protects the body from potentially harmful substances by recognizing and responding to antigens. Antigens are molecules (usually proteins) on the surface of cells, viruses, fungi, or bacteria.
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www.nlm.nih.gov/medlineplus/ency/article/000821.htm
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Immune System (March 2001) ... The human immune system is a truly amazing constellation of responses to attacks from outside the body. It has many facets, a number of which can change to optimize the response to these unwanted intrusions. The system is remarkably effective, most of the time.
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uhaweb.hartford.edu/BUGL/immune.htm
uhaweb.hartford.edu/BUGL/immune.htm
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