Which tissue type lines cavities and covers surfaces, including skin and glands?

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

Answer: (B)

Epithelial tissue lines cavities and covers surfaces, including the skin and glands. It forms the outer layer of the skin (the epidermis) and lines the inner surfaces of the mouth, digestive tract, airways, and ducts of glands. This tissue is specialized for protection, secretion, absorption, and filtration. Its cells are tightly packed and sit on a basement membrane, with distinct apical and basal surfaces, allowing rapid renewal and specialized functions like mucus production or selective absorption.

Muscle tissue contracts to produce movement. Nervous tissue transmits electrical signals for communication. Connective tissue provides support, fills spaces, and connects structures. The job of lining and covering surfaces and forming glands fits epithelial tissue best.