Which tissue provides protective covering on body surfaces?

• A. Nervous tissue
• B. Muscle tissue
• C. Epithelial tissue
• D. Connective tissue

Answer: (C)

Epithelial tissue forms the protective covering on body surfaces. It lines the skin’s outer layer (the epidermis) and all internal surfaces and cavities, including the mouth, eyes, and digestive and respiratory tracts, as well as the ducts of glands. This tissue creates a tight, continuous barrier that guards against mechanical injury, pathogens, and dehydration. In the skin, keratinized epithelial cells produce a tough, waterproof outer layer that adds extra protection. Epithelial tissue also regenerates rapidly, which helps repair any damage quickly. By contrast, nervous tissue, muscle tissue, and connective tissue serve other roles—transmitting signals, enabling movement, and providing support and structure—rather than forming the primary protective covering on body surfaces.