The Nervous System

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Across
  1. 3. Bundled togther neurones
  2. 7. An electrical signal
  3. 8. How many nerve cells make up the nervous system
  4. 9. What sends nerve impulses in only one direction
Down
  1. 1. Makes up the outer parts of the brain
  2. 2. Branch out from the cell body
  3. 4. Messages in the body are
  4. 5. Passes messages onto the next neurone
  5. 6. Contains the nucleus