How the windpipe trachea uses mucus to stop infection?

The windpipe, or trachea, is lined with a layer of mucus produced by goblet cells, which helps trap pathogens, dust, and other foreign particles. Cilia, tiny hair-like structures on the surface of epithelial cells, move the mucus upward towards the throat, where it can be swallowed or expelled. This mucociliary escalator mechanism plays a crucial role in preventing infections by clearing out harmful microorganisms and debris before they can reach the lungs. By maintaining a moist environment and facilitating the removal of contaminants, mucus serves as a vital defense against respiratory infections.