Final answer:
Oligodendrocytes produce the myelin sheath in the central nervous system, which is essential for proper nerve impulse conduction.
Step-by-step explanation:
The type of cells that produce the myelin sheath in the central nervous system (CNS) are oligodendrocytes. In contrast, the peripheral nervous system (PNS) relies on Schwann cells for the production of myelin. Oligodendrocytes are capable of extending their processes to insulate multiple axon segments with myelin, whereas Schwann cells wrap around a single axon segment. Myelination by these cells is critical for the rapid conduction of nerve impulses within the nervous system.