Mucociliary function is a vital process in the respiratory system that helps keep the airways clear of mucus and debris. It involves the coordinated movement of tiny hair-like structures called cilia that line the respiratory tract. These cilia beat in a rhythmic pattern, pushing mucus, which traps dust, pathogens, and other particles, toward the throat for removal. This function is essential for maintaining lung health and preventing infections. When the mucociliary escalator is impaired, due to factors like smoking or respiratory diseases, mucus can accumulate, leading to breathing difficulties and increased risk of respiratory infections.