SIMPLE CILIATED EPITHELIUM:
Structure: The simple ciliated epithelium comprises cells bearing fine, vibratile cilia on their free surface. Mixed with the ciliated cells, mucus-secreting goblet cells are found at intervals. It is of two types:
Cuboidal ciliated epithelium: It comprises cuboidal cells bearing cilia on their free surface. It is found in the nephrons and facilitates urine formation.
Columnar ciliated epithelium: It comprises columnar cells that bear cilia on the free surface. It forms the lining of the ventricles of the brain, oviducts, central canal of the spinal cord, nasal passages, and terminal bronchioles. It is also present in the lining of the alimentary canal.