Nervous System

The Nervous System Controls the body's internal function, also directs the body's voluntary and involuntary actions. Every task in the human body involves the Nervous system. The three main parts of the nervous system are Central Nervous System (CNS), Peripheral Nervous System (PNS), and Autonomic Nervous System (ANS). Parts of the CNS are the Brain and the Spinal Cord, the Brain and the Spinal Cord work with the peripheral Nervous system. This system forms a vast network of neurons. The Neurons carry messages back and forth between the nerves also help direct all involuntary and voluntary movement. Peripheral Nervous system is divided into 2 parts Somatic Nervous System (SNS), and ANS. The SNS controls most voluntary movement. For example when someone picks something up the SNS sends impulses to the brain to grasp the item. The ANS controls all involuntary movement, which includes breathing heartbeat, and digestion.

I10-13-nerves4.jpegTE-Nervous_system_diagram.png























http://www.nsta.org/publications/interactive/nerves/ (Some Animation, and Information on Nervous System, and Brain.)
http://itc.gsw.edu/faculty/gfisk/anim/autonomicns.swf(Animation about Sympathetic and Parasympathetic Nervous System.)

  • Main Parts of Nervous System
    • Central Nervous System (CNS)
      • Most complex collection that exists
      • Consists of the brain and the Spinal Cord

    • Peripheral Nervous System (PNS)
      • 2 parts: Somatic Nervous System and Autonomic Nervous System.
      • Controls voluntary and involuntary movement.
      • Serves as body's messenager

    • Autonomic Nervous System (ANS)
      • Controls Involuntary movement
      • Heartbeat, Digestion, and Breathing

    • Somatic Nervous System (SNS)
      • Controls Voluntary movement
      • Grabbing an item
      • Simple Movement