Alex

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Across
  1. 2. occurrence
  2. 6. laughing or chuckling
  3. 9. medicine name of blood vessels
  4. 11. very aware
  5. 14. a science that combines biology and acoustics
  6. 15. sign to do something
  7. 17. out of keeping
  8. 18. state of body
Down
  1. 1. a cell in your body
  2. 3. suttle change in color or name
  3. 4. a science for brains
  4. 5. associated with someone.
  5. 7. a hormone that increases blood speed
  6. 8. a steroid hormone that is produced
  7. 10. laughing loudly
  8. 12. lightly giggle
  9. 13. mental state
  10. 16. evil attends