“Cells of pseudostratified epithelia appear to be in several layers, but their basal ends all rest on the basement membrane. The pseudostratified columnar epithelium of the upper respiratory tract shown here contains many ciliated cells, as well as other cells with their nuclei at different levels” (Mescher, 2018, p. 85).

Reference

Mescher, A. L. (2018). Junquiera’s basic histology: Text and atlas. New York, NY: McGraw-Hill Education.