In which part of the nervous system do Schwann cells produce myelin?

• A. Central Nervous System
• B. Peripheral Nervous System
• C. Brain
• D. Spinal Cord

Answer: (B)

Schwann cells are the glial cells that wrap around axons in the peripheral nervous system to form the myelin sheath. In the central nervous system, myelin is produced by oligodendrocytes, and the brain and spinal cord are part of the CNS. So Schwann cells provide myelin in the peripheral nervous system. This distinction also helps explain why myelination and regeneration differ between the two main parts of the nervous system.