Nervous System
Central Nervous System (CNS)		Peripheral Nervous System (PNS) Carries messages to and from the CNS
Brain	Spinal Cord Connects brain and PNS	Somatic Nervous System Controls voluntary muscles and transmits sensory information to the CNS	Autonomic Nervous System Controls involuntary bodily functions
			Sympathetic Nervous System Arouses body to expend energy	Parasympathetic Nervous System Calms body to conserve and maintain energy