Which type has many layers of cells and no basement membrane, protecting delicate parts of the body?

• A. Simple cuboidal epithelium
• B. Columnar epithelium
• C. Ciliated epithelium
• D. Compound epithelium

Answer: (D)

A tissue with several stacked layers provides a tougher, more durable protective barrier for delicate tissues. This type is known as compound epithelium, because its multiple cell layers lay on top of one another to shield underlying tissues from wear, abrasion, chemicals, and pathogens. It’s found in surfaces exposed to friction and harm, like areas of the skin or mucous membranes, where protection is crucial. In contrast, simple cuboidal and columnar epithelia have a single layer of cells and are more focused on absorption and secretion, while ciliated epithelium adds movement to substances along surfaces. The multi-layered arrangement of compound epithelium is what makes it best suited for protection.