has part has part has_part ciliated epithelial cell ciliated columnar epithelium pseudostratified columnar epithelium pseudostratified ciliated columnar epithelium Epithelium composed of a single layer of cells, appearing as layered because the column-shaped cells vary in height so the nuclei are at different levels. The basal portions of all the cells are in contact with the basement membrane. It lines the respiratory system and the male reproductive tract. The cilia in the respiratory tract are motile, while the stereocilia in the male reproductive tract are immobile. UBERON:0010499 FMA:13146 NCIT:C13181 epithelium pseudostratificatum columnare ciliatum (trachea et bronchi)