What role do goblet cells play in the respiratory system?

Goblet cells play a crucial role in the respiratory system by producing mucus, which serves to trap particles such as dust, pathogens, and other foreign materials that enter the airways. The mucus acts as a protective barrier, preventing these harmful substances from reaching the delicate tissues of the lungs. This trapping mechanism is vital for maintaining clear air passages and ensuring that the respiratory system functions efficiently. Additionally, the mucus can facilitate the movement of trapped particles out of the respiratory tract through the action of ciliated cells, which help to transport the mucus upward toward the throat where it can be coughed out or swallowed. This function of goblet cells is essential for respiratory health, highlighting their significance in the body's defense mechanisms against respiratory infections and irritants.