The respiratory epithelium is a specialized type of tissue that lines the airways of the respiratory system. It primarily consists of ciliated columnar cells, goblet cells, and basal cells. This epithelium plays a crucial role in protecting the lungs by trapping and clearing out dust, pathogens, and other particles from the air we breathe. Ciliated cells have tiny hair-like structures called cilia that help move mucus and trapped particles out of the airways. Goblet cells produce mucus, which moistens the air and traps debris. Together, these functions help maintain clear air passages and support overall respiratory health.