William's crossword puzzle

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Across
  1. 2. photo receptor in the eye that distinguishes shapes
  2. 3. relating to material things
  3. 6. controls memory, language, and thought
  4. 8. gap between two neurons
  5. 9. automatic movement in response to a stimulus
Down
  1. 1. cord tube like structure of neurons
  2. 2. special structure within the sensory system
  3. 4. coordinates voluntary muscle movement
  4. 5. stem controls involuntary functions
  5. 7. disturbance that transfers energy