The immune system:

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(B) The immune system is a complex network of cells,tissues,and organs that work together to defend the body against harmful invaders.Its primary func

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Recognizes foreign antigens and responds to them.

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(B) The immune system is a complex network of cells,tissues,and organs that work together to defend the body against harmful invaders.Its primary function is to distinguish between 'self' (the body's own cells) and 'non-self' (foreign antigens like bacteria,viruses,and parasites).Once a foreign antigen is recognized,the immune system initiates a specific response to eliminate or neutralize the threat.Therefore,the correct statement is that it recognizes foreign antigens and responds to them.

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