What does the central nervous system (CNS) include?

What does the central nervous system (CNS) include?

• A. Nerves outside CNS
• B. Spinal cord only
• C. Brain and spinal cord
• D. Brain only

Answer: (C)

The central nervous system is the main processing and control hub of the nervous system. It includes the brain, which handles thinking, memory, and coordinating body activities, and the spinal cord, which carries messages between the brain and the rest of the body and can coordinate reflexes on its own. Nerves outside this system form the peripheral nervous system, so calling them part of the CNS isn’t correct. That’s why the brain and spinal cord together are the CNS. The other options miss either a critical part or include components outside the CNS.

The central nervous system is the main processing and control hub of the nervous system. It includes the brain, which handles thinking, memory, and coordinating body activities, and the spinal cord, which carries messages between the brain and the rest of the body and can coordinate reflexes on its own. Nerves outside this system form the peripheral nervous system, so calling them part of the CNS isn’t correct. That’s why the brain and spinal cord together are the CNS. The other options miss either a critical part or include components outside the CNS.