Describe two disadvantages of breathing through the mouth rather than the nose. give the answer in simplest shortest form.
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Answer

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Step 1:
Disadvantage 1

Less air filtration; dust and microbes enter more easily.

Step 2:
Disadvantage 2

Air is less humidified and warmed before reaching lungs.

Step 3:
Final Answer

Mouth breathing allows more dust/microbes and less humidified air into lungs.