How do epithelium cells stop dust?

Epithelial cells, particularly those in the respiratory tract, are equipped with cilia and mucus. The cilia move in a coordinated manner to sweep dust and other particles trapped in mucus out of the airways, preventing them from reaching the lungs. Mucus, produced by goblet cells, traps dust and microorganisms, facilitating their removal through coughing or swallowing. This protective mechanism helps maintain clear airways and overall respiratory health.