The nervous system  - The brain, the spinal cord, and nerves are all part of the ___________________., The spinal cord  - The vertebrae protects this nervous system part , The brain - This organ controls ALL the body functions , Neurons - Nerves are made up of these and they have three parts, Peripheral Nervous System - all the nerves that branch out from the spinal cord, Central Nervous System - CNS- is made of the brain and the spinal cord, Voluntary action - response that you have control over, Involuntary action - response that you do not control, Homeostasis - A balanced internal Environment,

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