The tiny projections are called cilia.
Infectious agents, small aerosol and dust particles are trapped in the mucus elevator to prevent their invasion in lungs.
cilia
Emphysema
The bronchi are located in the lungs and are coated with mucus. They also have cilia which are small hair-like projections on the surface of the bronchi that move the mucus towards the outside of the body.
microtubules
The cilia on their surface trap dust and microbes, then pass the trapped substances along with mucus to the throat, where they can then be swallowed. This then protects the lungs.
Ciliated Epithelial Cells have tiny hairs on them. These hairs sweep away any unwanted things, such as bacteria and dust which is trapped in mucus.
Without mucus, your non-skin surfaces would dry out (and those cells would die), less dust would be trapped on the way to your lungs and so the incidence of infection would increase.
mucus- mucus in the lungs makes breathing difficult
Ciliated CellsThey are adapted by tiny hair like projections called cilia.Produce mucus which traps the bacteria and dust.
the function of the mucus blanket in the lungs is to filter and moisten the air.
Your lungs are the reasons you body has Oxygen. In your lungs, we do produce mucus, which we cough up because of the cilia in our lungs. Smoking causes this cilia to not move the mucus out of your lungs which in turn causes problems.