Answer: The brain and spinal cord
Step-by-step explanation:
The central nervous system is made up of the brain and the spinal cord. The brain plays a very important role in the body as it's used in controlling most of the bodily functions, such as movements, speech, awareness, memory etc.
The spinal cord is vital as it helps in sending signals from the brain to the rest of the body and controls musculoskeletal reflexes.