Which tissue type forms the brain, spinal cord, and nerves?

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

Answer: (A)

Nervous tissue is specialized for rapid signaling and coordination in the body. It contains neurons that transmit electrical impulses and glial cells that support and protect those neurons. The brain and spinal cord make up the central nervous system, which is composed predominantly of nervous tissue, and nerves are bundles of neuronal processes (axons) extended out to the rest of the body—also part of nervous tissue. This tissue type enables sensing, processing, and directing bodily functions.

Muscle tissue contracts to move parts of the body, epithelial tissue lines surfaces and cavities, and connective tissue provides support and binding; none of these form the brain, spinal cord, or nerves.