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DennyRombardt t1_ixnqvq7 wrote

If you close your mouth, you just breathe through your nose. If you open your mouth, you breathe through your mouth and nose. If you have a perforated ear drum, you can breathe through your ears. When you breathe in, air will enter through any orifice available unless you physically block it yourself. Your body has no way to do it. Apart from obviously closing your mouth.

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SteptimusHeap OP t1_ixntq7k wrote

I can keep my mouth open and choose to breathe through my nose or mouth, what are you on about?

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DennyRombardt t1_ixnuj34 wrote

That's your epiglottis, which you discounted. Other than that, there is nothing.

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SteptimusHeap OP t1_ixo0y8e wrote

How does the epiglottis block air coming in from the nose?

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DennyRombardt t1_ixo1fsb wrote

It doesn't. It blocks air coming in from your mouth. You can have your mouth open and only breath through your nose. Your epiglottis and tonsils close up at the back of your throat to block it. There is no internal way for you to block your nose.

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