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Five Ways The Nose Freshens Air
- Nostril hairs work like a net to catch pollen, insect bits, and skin flakes.
- Sticky mucus lining the nasal cavity traps bacteria, viruses, and dust particles.
- Hair-like cilia in the nasal lining move from side to side to waft germ-laden mucus to the throat, where it is swallowed and treated to an acid bath in the stomach.
- Blood vessels lining the nasal cavity act like radiators to warm the air-especially useful on cold days.
- The nasal lining loses water vapour to make even the driest air moist.