Human Nervous System

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  • HUMAN NERVOUS SYSTEM
    • Central Nervous System  (CNS)
      • Brain
      • Spinal Cord
    • Peripheral Nervous System  (PNS)
      • Somatic Nervous System
        • 12 cranial nerves in brain and 31 spinal nerves in spinal cord
      • Autonomic Nervous System
        • Sympathetic Nervous System
        • Parasympath-etic Nervous System
          • Fight or flight response
            • Sympathetic Nervous System
        • Governs vital functions e.g. breathing, heart rate and digestion
      • Transmits messages via nerve cells to and from the CNS

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