Histology of Respiratory Epithelium

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• Most of the conducting portion is lined with ciliated pseudostrtified columnar epithelium that contain rich population of goblet cell known as respiratory epithelium.Typical respiratory epithelium consists of 5 types of cells—
•         i.            Ciliated columnar cell: Most abundant
•       ii.            Goblet Cell: The next abundant cell
•     iii.            Basal cell: Small rounded cells that lie on the basal lamina,Considered as generative cells that differentiate to other cells.
•    iv.            Brush cell: Contain numerous microvilli in the apical surface
•      v.            Small granule cells: resembles  basal cells exception it posses numerous granules.These cells are also categorized as neumerous endocrine cells.