brush cell of tracheobronchial tree
brush cell of tracheobronchial tree
"A rare type of columnar epithelial cell that is part of the tracheobronchial epithelium. This cell is characterized by a distinctive tuft of apical microvilli, which extends into the cytoplasm, and a pear-shaped morphology, broad at the base and tapering to a narrow apex. It plays vital roles in chemosensation, producing cytokines like IL-25, and enhancing mucociliary clearance through acetylcholine release to support mucus movement and airway defense."