Question

It is important, but not absolutely necessary, for air to enter through the nasal cavity.

Answer 1

Answer:

Agree. Yes, you can but you can also inhail through mouth and exhail by mouth or do both by nose. For example, ever notice when you are trying to hold your breathe and just need to let it out? Well that is because carbon dioxide is buliding up. Your body breathes in oxygen and releases carbon dioxide.

Explanation:

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