GENERAL HISTOLOGY

Detailed explanation-1: -Ciliated pseudostratified columnar epithelia is the type of respiratory epithelium found in the linings of the trachea as well as other respiratory tract, which allows filtering and humidification of incoming air.

Detailed explanation-2: -The luminal surface of the trachea is lined with a pseudostratified columnar epithelium. In some areas, individual epithelial cells can be identified in this semi-thin section. Features of this epithelium: Cilia-extend 5 to 7 µm from the surface of the epithelial cells.

Detailed explanation-3: -The presence of pseudostratified columnar epithelium in the upper respiratory tract (composed of the nose, trachea and bronchi) protects the lungs from these irritants. Goblet cells of the epithelium secrete mucus to trap particles and prevent them from traveling further down respiratory passages.

Detailed explanation-4: -Pseudostratified ciliated epithelium lines the nasal cavities, trachea, and bronchi. It contains several types of cell. The basal cells (1), the nuclei of which form a basal row, are poor in internal structures. They serve to replace dead ciliated cells.