Epithelial tissue primarily functions to

• A. Covers and protects body surfaces and internal organs
• B. Coordinates body functions
• C. Stores energy
• D. Contracts to produce motion

Answer: (A)

Epithelial tissue mainly functions as a protective covering and barrier for body surfaces and internal organs. It lines skin, cavities, and the linings of organs, forming a continuous sheet that safeguards against mechanical injury, dehydration, and invasion by pathogens. Some epithelial cells also specialize in absorption or secretion, which is why glandular epithelia play a key role in releasing substances and lining ducts.

Other tissue types handle different roles: coordinating body functions is a hallmark of nervous and endocrine tissues; storing energy is the job of adipose tissue; contracting to produce motion is the responsibility of muscle tissue. Because epithelial tissue’s defining role is protection and coverage, it is the best choice.