What is the purpose of snot?
by 
Luc Thiet Thuan
ANSWERS: 2
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To gross out your sister
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It serves a purpose of keeping harmful bacteria/viruses/toxins/dirt, etc out of your body. You get a runny nose when your nose 'feels' these things in your nose. Even when your sinuses are clear you still have mucus that serves to filter and catch these things.
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