Nervous system

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Across
  1. 1. cord, extends to all parts of the body
  2. 4. part of the nervous system
  3. 5. fibers, they branch off from the spinal cord
  4. 6. organs, part of the nervous system
Down
  1. 1. muscles, part of the nervous system
  2. 2. part of the nervous system
  3. 3. the headquarters of the nervous system
  4. 7. part of the nervous system