ANATOMY

Detailed explanation-1: -The bronchus in the lungs are lined with hair-like projections called cilia that move microbes and debris up and out of the airways. Scattered throughout the cilia are goblet cells that secrete mucus which helps protect the lining of the bronchus and trap microorganisms.

Detailed explanation-2: -In general, the trachea is lined with ciliated pseudostratified columnar epithelium.

Detailed explanation-3: -The majority of the respiratory tree, from the nasal cavity to the bronchi, is lined by pseudostratified columnar ciliated epithelium.

Detailed explanation-4: -The ciliated cells are located across the apical surface and facilitate the movement of mucus across the airway tract. The goblet cells produce and secrete mucous to trap pathogens and debris within the airway tract.

Detailed explanation-5: -The inside of the trachea is lined with pseudostratified ciliated columnar epithelium, which is continuous with the larynx. This epithelial layer has mucus producing goblet cells that are only visible at high magnification.