part of part of has part has characteristic develops from has characterizing marker set NS forest marker set of multiciliated columnar cell of tracheobronchial tree (Human lung). columnar/cuboidal epithelial cell multiciliated columnar cell of tracheobronchial tree 2010-08-24T03:38:29Z Ciliated columnar cells of the tracheobronchial tree compose the inner lining of the tracheobronchial tree, the system of airways consisting of trachea, bronchi and bronchioles that allow passage of air into the lungs, where gas exchange occurs. A defining feature of these endo-epithelial cells are the tiny hair-like structures covering their surface, known as cilia. The nucleus is located at the base of the cell, and the area above it is rich in mitochondria and well-developed endoplasmic reticulum, both crucial for the energy-intensive process of cilia operation. The primary function of these ciliated cells is to keep the respiratory tract clean via mucociliary clearance or the respiratory escalator. These cells create a two-layered 'coat': The lower "sol" layer is watery where the cilia can beat in coordinated waves, and the upper "gel" layer is thick and sticky, trapping inhaled particles, such as dust, bacteria, viruses, and other potentially harmful substances. This rhythmical beating of the cilia then moves the mucus and trapped particles upwards and out of the respiratory tract, which is then either coughed out or swallowed. Damage or dysfunction of these ciliated cells, as seen in diseases such as primary ciliary dyskinesia, cystic fibrosis, or chronic bronchitis, may lead to reduced or ineffective mucociliary clearance and an increased susceptibility to respiratory infections. (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.) FMA:70542 ciliated columnar cell of tracheobronchial tree A multi-ciliated epithelial cell located in the trachea and bronchi, characterized by a columnar shape and motile cilia on its apical surface. These cilia facilitate mucociliary clearance by moving mucus and trapped particles toward the pharynx. The marker set C1orf194, MS4A8 can identify the Human cell type multiciliated columnar cell of tracheobronchial tree in the lung with a confidence of 0.86 (NS-Forest FBeta value). https://cellxgene.cziscience.com/cellguide/CL_0002145 These cells possess numerous cilia on their surface, typically ranging from 200 to 300 per cell. The cilia vary in length, measuring between 6 to 7 μm in the upper airways (trachea) and becoming shorter, around 4 μm, in the smaller airways (terminal bronchioles). These cells form a two-layered 'coat' in the airway: the lower 'sol' layer is watery, allowing the cilia to beat in coordinated waves, while the upper 'gel' layer is thick and sticky, trapping inhaled particles. epithelial cell of tracheobronchial tree intermediate epitheliocyte respiratory tract multiciliated cell motile cilium Homo sapiens multiciliated tracheobronchial epithelium