Nervous system

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Nervous system

  1. 1. THE BRAIN AND THE NERVOUS SYSTEM
  2. 2. THE NERVOUS SYSTEM <ul><li>Internal and external receptors </li></ul><ul><li>Sends the information to </li></ul><ul><li>Interprets the information </li></ul><ul><li>The nervous system </li></ul><ul><ul><ul><ul><ul><li>Makes an answer </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>http://www.youtube.com/watch?v=iBnGeDzTYD4&feature=related </li></ul></ul></ul></ul></ul>
  3. 3. THE NERVOUS SYSTEM IS DIVIDED INTO: <ul><li>THE CENTRAL NERVOUS SYSTEM </li></ul><ul><li>PERIPHERAL NERVOUS SYSTEM </li></ul>
  4. 4. THE CENTRAL NERVOUS SYSTEM has two parts <ul><li>THE BRAIN </li></ul><ul><li>The brain is divided into: </li></ul><ul><li>CEREBRUM </li></ul><ul><li>CEREBELLUM </li></ul><ul><li>THE BRAIN STEM </li></ul><ul><li>THE SPINAL CORD </li></ul><ul><li>It´s in the back. It controls involuntary movements called reflexes. </li></ul>
  5. 5. <ul><li>THE CEREBRUM </li></ul><ul><li>Controls all the voluntary action </li></ul><ul><li>THE CEREBELLUM </li></ul><ul><li>Co-ordinates movements and controls balance </li></ul>
  6. 6. <ul><li>THE BRAIN STEM controls many organs in the human body (for example, it controls heartbeats) </li></ul>
  7. 7. THE NEURONS <ul><li>The nervous system is formed by million of neurons or nerve cells </li></ul>
  8. 8. Dendrites : the end of the neuron. Receive the signals
  9. 9. Axons: long extention Conducts the nerve signals
  10. 10. The cell body: Contains the nucleus and the organelles
  11. 11. The nervous system reacts with: <ul><li>Voluntary movements </li></ul><ul><li>We move when we want </li></ul><ul><li>BRAIN </li></ul><ul><li>MOTOR NERVES </li></ul><ul><li>MUSCLES </li></ul><ul><li>VOLUNTARY MOVEMENT </li></ul><ul><li>Involuntary movements </li></ul><ul><li>We move withour realising it </li></ul><ul><li>BRAIN AND SPINAL CORD </li></ul><ul><li>MOTOR NERVES </li></ul><ul><li>MUSCLES </li></ul><ul><li>INVOLUNTARY MOVEMENTS </li></ul>

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