part_of part of respiratory basal cell basal cell of epithelium of trachea FMA:263118 A basal cell that is part of the epithelium of trachea. Basal cells of epithelium of trachea are a vital cell population within the respiratory tract's lining, specifically in the trachea's epithelium. These cells are located at the base of the columnar epithelial cell layer and can be identified by their characteristic cuboidal shape, a large nucleus and few organelles, as well as scattered microvilli. The basal cells are not in direct contact with the lumen, which is covered by a layer of ciliated and non-ciliated columnar cells. Instead, the basal cells are connected to, and line, a thin basement membrane. The primary function of basal cells involves stem cell activity and epithelial tissue maintenance. Basal cells in the trachea play a crucial role in the regeneration and repair of the tracheal epithelium during damage or injury, acting as progenitor cells for ciliated and secretory cells. They serve as a reserve pool of cells, ready to proliferate and differentiate as needed for homeostatic tissue maintenance or in repair processes when the epithelium has been compromised, whether by injury or disease. These cells are also implicated in numerous disease pathways. Conditions like chronic obstructive pulmonary disease and lung cancer exhibit unusual behavior and quantities of tracheal basal cells, making these cells a focal point in respiratory disease research. In summary, basal cells in the tracheal epithelium have a multifaceted role in maintaining, repairing, and influencing tracheal health, playing a crucial role in the stability of the respiratory system. (This extended description was generated by ChatGPT and reviewed by the CellGuide team, who added references, and by the CL editors, who approved it for inclusion in CL. It may contain information that applies only to some subtypes and species, and so should not be considered definitional.) epithelium of trachea