Air needs to be clean, moist, and warm before entering the throat because the lower respiratory tract has delicate structures.
O ar precisa ser limpo, úmido e quente antes de entrar na garganta porque o trato respiratório inferior possui estruturas delicadas.
| Front | why does air need to be clean, moist, and warm before entering the throat? |
|---|---|
| Back | lower respiratory tract has delicate structures |
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