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Why do we need 2 nostrils?

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Anonymous

14y ago
Updated: 8/19/2019

So that we can get more oxygen in our body and more carbon dioxide out of our body.

The reason is air filtration. Each nostril has hunderds of hairs and mucous to trap particulate in the air. One nostril would be less effective at trapping since there would be more air traveling through the nostril that would not come into contact with hairs/ nostril lining which has mucous.

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Wiki User

14y ago

What else can I help you with?