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OpenStudy (anonymous):
Which of the following are part of the body’s first line of defense against pathogens? a.white blood cells b.red blood cells c.lymph nodes d.mucous membranes
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OpenStudy (anonymous):
It would be D because the first line of defense is non specific and tries to prevent pathogens from entering certain parts of the body. :)
OpenStudy (anonymous):
The mucous membrane lines the stomach to prevent any thing from ruining your stomach walls
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