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15-10-2018
Health

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The main function of the lymph nodes is to A. filter bacteria and viruses from the arterial blood circulation. B. produce and secrete chemicals that recognize disease-causing pathogens. C. guard the body from microorganisms in food and air. D. store immune cells until they're needed.

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NerdBirdSami NerdBirdSami

15-10-2018

A. They serve as filters

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