This thin plastic section from the olfactory epithelium shows the ciliated
pseudostratified columnar epithelium that lines the nasal passages. The
nuclei of the epithelial cells are located at
several layers, but they do not form the clearly dilineated rows of nuclei
characteristic of truly stratified epithelia. Note that the surface of the
epithelium is covered with cilia, which
are located at the apices of the cells.