nervous system

• Nervous system


  Network of organs and nerves that send signals throughout the body
• Lungs remember to breathe when we're asleep


  Nervous system is in charge of this
• Nose tells you that your favorite cookies are baking in the kitchen

  Nervous system is in charge of this
• Nervous system


  Nervous system controls everything we do including breathing, smelling and moving
• Main parts of the nervous system

  • Central nervous system
  • Peripheral nervous system
• Central nervous system


  Part of the nervous system consisting of the brain and spinal cord
• Brain


  • Lies protected inside the skull
  • Controls all body functions by receiving and sending messages through the nerves
• Major parts of the brain

  • Cerebellum
  • Cerebral hemispheres
  • Brain stem
• Cerebellum


  Biggest part of the brain
• Cerebral hemispheres


  • Left part is more analytical, helping with math, speech and logic
  • Right part helps with abstract thinking like music, shapes and colors
• Brain stem


  • Links the brain to the spinal cord and the rest of the body
  • In charge of functions needed to stay alive like breathing and digesting
• Peripheral nervous system


  Includes all the nerves that go from the skin, muscle and organs to the spinal cord and brain
• Functions of the peripheral nervous system

  • Sensory nerves receive information and carry messages to the brain
  • Motor nerves carry messages from the brain to the body
• Peripheral nervous system


  Controls some automatic actions like breathing and digesting
• Parts of a neuron

  • Nucleus
  • Dendrites
  • Axon
• Dendrites


  Take in the electric messages to the cell bodies
• Axon


  Takes the messages away from the cell body