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Biology 14 Online
OpenStudy (anonymous):

the bodys first line of defense against infection includes all of the following except

OpenStudy (anonymous):

Can you provide choices?

thomaster (thomaster):

First line of defence includes skin, tears, mucus, cilia, stomach acid, urine flow, commensal bacteria and neutrophils. So probably 3 of these are in the options and 1 doesn't.

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