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what happens to air as it passes through the respiratory system
air is trapped, cooled, and moistened
air is filtered, warmed, and moistened
air is cooled, filtered, and dried
air is trapped, filtered and dried

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Answered by GPT-5 mini AI
Air is filtered, warmed, and moistened.

Briefly: nasal hairs and mucus trap particles and cilia move them out (filtering), the rich blood supply in the nasal mucosa warms the air, and the mucous membranes humidify (add moisture to) the air.