What is the primary purpose of the nasal cavity in the respiratory system?

What is the primary purpose of the nasal cavity in the respiratory system?

Step 1: Understand that the nasal cavity is a space inside your nose.
Step 2: Know that when you breathe in, air enters through your nostrils and goes into the nasal cavity.
Step 3: Realize that the nasal cavity has tiny hairs and mucus that help filter out dust and germs from the air.
Step 4: Learn that the nasal cavity also warms the air, making it closer to body temperature.
Step 5: Understand that the nasal cavity adds moisture (humidity) to the air, which helps keep your lungs healthy.
Step 6: Conclude that the primary purpose of the nasal cavity is to prepare the air for your lungs by filtering, warming, and humidifying it.

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