Answer: Number of cell layers and shape of cells
How are epithelial tissues classified?

Chapter 2. Mammalian Epithelial Tissue - SteveGallik.org

Types of Epithelial Tissue

Epithelial Tissue: Structure with Diagram Function Types ...

Epithelial Tissue - Definition Types Function & Examples ...

Epithelium - Wikipedia

In general epithelial tissues are classified by the number of their layers and by the shape and function of the cells. The three principal shapes associated with epithelial cells are squamous cuboidal and columnar. • Squamous epithelium has cells that are wider than their height (flat and scale-like). This is found as the lining of the mouth oesophagus and including blood vessels and in the alveoli of the lungs.

The epithelial tissues are formed by cells that cover the organ surfaces such as the surface of skin the airways surfaces of soft organs the reproductive tract and the inner lining of the digestive tract. The cells comprising an epithelial layer are linked via semi-permeable tight junctions; hence this tissue provides a barrier between the external environment and the organ it covers. In addition to this protective function epithelial tissue may also be specialized to function in secretion excretion and absorption. Epithelial tissu…

Respiratory epithelium or airway epithelium is a type of ciliated columnar epithelium found li ning most of the respiratory tract as respiratory mucosa where it serves to …

A simple c...

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