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| Overview of the immune system |
THE IMMUNE SYSTEM IS A REMARKABLY VERSATILE defense system that has evolved to protect animals from invading pathogenic-microorganisms and cancer.It is able to generate an enormous variety of cells and molecules capable of specifically recognizing and eliminating an apparently limitless variety of foreign invaders.
Functionally,an immune response can be divided into two related activities- recognition and response.Immune recognition is remarkable for its specificity.The immune system is able to recognize subtle chemical differences that distinguish one foreign pathogen from another.
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