Which cell type is predominantly found in the airway epithelium?

The predominant cell type found in the airway epithelium is pseudostratified, ciliated columnar epithelium. This type of epithelium plays a crucial role in the respiratory system, particularly in the upper and lower airways. The cilia on the surface of these cells are essential for moving mucus and trapped particles out of the airways, thus helping to keep the lungs clear of pathogens and debris.

Additionally, the presence of goblet cells, which are interspersed among the pseudostratified, ciliated columnar cells, allows for mucus production that further aids in trapping inhaled particles and providing moisture to the airway. This anatomical arrangement is particularly adept at performing the protective and secretory functions necessary for maintaining respiratory health.

In contrast, squamous cells are flat cells typically found in locations that require a protective barrier, like the skin or some regions of the lungs, but they do not reflect the predominant cell type in airway epithelium. Simple cuboidal cells are generally associated with glands and some ducts but don't represent the structure of the airway lining. Columnar cells, while they do make up some epithelial linings, are not specifically organized in the pseudostratified manner seen in the