Biology
Biology, 21.05.2020 19:08, bellbug08

What is an example of a mechanical barrier for our immune system?
a. skin
b. nose hairs
c. tonsils
d. lungs


What is an example of a mechanical barrier for our immune system? a. skin b. nose hairs c. tonsils

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What is an example of a mechanical barrier for our immune system?
a. skin
b. nose hairs...

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