What is the Difference Between Simple and Compound Epithelium?

The main difference between simple and compound epithelium lies in the number of cell layers and their respective functions. Here are the key differences:

• Simple Epithelium:
• Consists of a single layer of cells.
• Found in areas where absorption of substances occurs.
• Functions as a lining for ducts, body cavities, and tubes.
• Examples: Squamous epithelium (lining the walls of blood vessels), cuboidal epithelium (lining the ducts of glands), and columnar epithelium (lining the intestine and stomach).
• Compound Epithelium:
• Comprises more than one layer of cells.
• Present on surfaces where the chances of wear and tear are high.
• Usually protective in function, protecting against mechanical and chemical stress, and having a limited role in absorption and secretion.
• Covers the skin, buccal cavity, pancreatic ducts, inner lining of salivary ducts, and pharynx.

Both simple and compound epithelium share some common properties, such as being closely packed with cells, lying over a basement membrane, and not containing capillaries. However, they differ in their structure and functions, with simple epithelium being a single layer that lines internal surfaces and compound epithelium consisting of multiple layers for protection and support.

Comparative Table: Simple vs Compound Epithelium

Here is a table comparing simple and compound epithelium:

Simple epithelium consists of a single layer of cells and is responsible for functions such as absorption, secretion, and diffusion. It is found in locations like ducts, body cavities, tubes, blood vessels, and the air sacs of lungs. On the other hand, compound epithelium consists of more than one layer of cells and provides protection against mechanical and chemical stress. It is found in locations like the skin, buccal cavity, pancreatic ducts, and inner lining of salivary ducts.