What is the function of cilia in ciliated epithelial cells?

Cilia in ciliated epithelial cells play a crucial role in the movement of mucus and particles. These tiny, hair-like structures are located on the surface of certain epithelial cells, particularly in the respiratory tract. When cilia move in a coordinated, wave-like fashion, they help to propel mucus, which traps dust, pathogens, and other particles, away from the lungs and out of the respiratory system. This mechanism is vital for maintaining cleanliness in the airways and protecting the underlying tissues from irritation or infection caused by inhaled materials. The effectiveness of cilia in this function is essential for respiratory health, demonstrating their importance beyond simply serving as a barrier or absorbing substances.