The trachea is also lined with tiny hair-like structures called cilia. These help push mucus that contains debris or pathogens out of the trachea. A person then either swallows or spits out the mucus.

But so do other things like little bits of dust, pollen and pollution like ... setup in your windpipe – also called the trachea. There, the cilia move the mucus up the windpipe like an escalator.

Caption The HEATR2 protein (red) is located in the body of airway cells lining the trachea, not in the cilia (green) or the nuclei (blue). Finding HEATR2 outside of the cilia was the first clue ...

The air that enters the nasal cavity flows down the trachea ... cells produce mucus which traps dust, dirt and bacteria to prevent them entering the lungs. Cilia are small hairs which beat ...