*1.3.1 Cover epithelium*

The cover epithelium lines up the outer surface of the body and the inner surface of the hollow organs. The multilayer squamous epithelium, which forms the epidermis of the skin, has a protective effect by covering the outer surface of the body. Under the epithelium, there is a lamina propria and they are called as mucosa together and cover the inner surface of the cavities. Structures such as nasal mucosa, airway mucosa, digestive system mucosa, and urinary tract mucosa are good examples of laying lumen structures related to epithelial tissue [4–8].
