What is the main role of the nose and nasal cavities in the respiratory system?

Question

Question 4 options:

To store excess oxygen

To regulate effects of elevation

To produce sound for speech

To filter, warm, and humidify the air

Answer 1

The main role of the nose and nasal cavities in the respiratory system is:

To filter, warm, and humidify the air.

The nasal passages are equipped with hairs and mucus, which trap particles and pathogens, while the rich blood supply warms and humidifies the incoming air before it travels to the lungs.