The Nervous System

The nervous system

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The Autonomic Nervous System

The Autonomic Nervous System regulates the body's involuntary activities, and is divided into the sympathetic and parasympathetic systems.

Sympathetic System

  • Prepares body for action
  • Increases heart beat
  • Dilates arteries in skeletal muscles
  • Slows gut movement
  • Dilates bronchioles

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  • Causes sweat glands to secrete
  • Causes hair to stand erect
  • Dilates pupil
  • Bladder and anal sphincters contract
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