b13

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Across
  1. 2. Auditory signal
  2. 4. Recovery state
  3. 6. Capacity to do work
  4. 7. Movement
  5. 11. Life-based element
  6. 13. Flavor sense
  7. 15. Quick responses
  8. 18. Group of similar cells
  9. 19. Natural living place
  10. 20. Reproducing population
Down
  1. 1. Group of organs
  2. 3. Gas for respiration
  3. 5. Organisms and environment
  4. 8. Physical sense
  5. 9. Individual living thing
  6. 10. Body position
  7. 12. Functional biomolecule
  8. 14. Visual sense
  9. 16. Odor sense
  10. 17. Body stability