Central nervous system (CNS) - consists of brain and spinal cord, Peripheral nervous system (PNS) - consists of a network of nerves to and from the muscles, skin and organs, Brain - protected by the skull , Spinal cord - protected by the spinal vertebrae , Motor nerves - receive messages from the CNS to allow voluntary movement, Autonomic nerves - control involuntary responses of organs and glands, Sensory nerves  - transmit information from the body to the CNS,

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