Structures & Divisions of Nervous System
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Peripheral Nervous System
-12 pairs of cranial nerves -31 pairs of spinal nerves -transmits signals to and from CNS
Central Nervous System (CNS)
-includes brain and spinal cord -receives and processes information -regulates all activities of the body
Autonomic Nervous System
-organized into 2 divisions, sympathetic nerves & parasympathetic nerves
structures of nervous system
nerves, brain, spinal cord, and sensory organs (eyes, ears, nose, skin, and tongue)
sympathetic nerves
prepare the body for emergencies and stress by increasing the respiratory rate. Becomes aroused as part of the fight of flight response.
parasympathetic nerves
return the body to normal after a response to stress.
