ITEC Respiratory System Practice Exam 2026 - Free Respiratory System Practice Questions and Study Guide

Cilia play a crucial role in the respiratory tract by trapping and removing particles, including dust, allergens, and pathogens, from the air we breathe. They are tiny hair-like structures that line the airways and work in a coordinated manner, moving in a wave-like motion. This movement helps to push mucus, which traps unwanted particles, towards the throat, where it can be swallowed or expelled.

By effectively clearing the respiratory passages of these contaminants, cilia contribute significantly to maintaining clear airways and reducing the risk of respiratory infections. This mechanism is essential for the overall health of the respiratory system, ensuring that air reaching the lungs is as clean as possible.