The brain sends instuctions to the rest of Celeste's body via the spinal cord, telling her body what to do. Celeste's nerve fibers connect all the parts of her body to her brain, carrying messages through the spinal cord. Together, her brain and spinal cord make up the Central Nervous System.
• Central Nervous System = Brain + Spinal Cord
• Peripheral Nervous System = Nerves to rest of body
• Sensory nerves carry messages from the body to the brain
• Motor nerves carry messages from the brain to the body