Nervous System, So Far...

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Across
  1. 2. the name of the fatty sheath which coats a nerve cells long body
  2. 3. when a part of our body works without control
  3. 4. the number of neck bones in a human and giraffe
  4. 5. the headquarters of the nervous system
  5. 6. the nervous system is split in to how many main parts?
  6. 8. the body system responsible for breathing
  7. 12. the body system made of all your muscles
  8. 13. the body system consisting of all your bones
  9. 14. lots of cells make a
  10. 15. consists of all the nerves that leave the spinal cord (acronysm)
  11. 17. the body system responsible for pumping blood around your body
  12. 18. the bran of a neuron which recieves signals
  13. 19. the part of the nerve cell which sends the signal to the next nerve
  14. 20. lots of tissue makes a
Down
  1. 1. the body systems used to extract nutrients from food
  2. 3. the long part of the nerve cell body
  3. 5. a collection of organs make (two words, separated by a -)
  4. 7. a type of action or bodily process you have control over
  5. 9. the body system name given to your skin
  6. 10. the basic building block of life
  7. 11. consists of the brain and spinal cord (acronym)
  8. 16. a collection of body systems makes an