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Across
  1. 3. Air sacs in the lungs
  2. 5. Detects stimulus
  3. 9. Protein that fights infection
  4. 11. Colored part of the eye
  5. 12. Functional unit of kidney
  6. 14. Vibrates with sound in the ear
  7. 17. Liquid part of blood
  8. 18. Hearing organ in the ear
  9. 22. Light-sensitive part of eye
  10. 23. Organ for breathing
  11. 24. Absorbs nutrients from food
  12. 25. Focuses light in the eye
Down
  1. 1. Urine exits the body
  2. 2. Related to sense of smell
  3. 4. Digests food
  4. 6. Regulates light entering the eye
  5. 7. Senses taste on the tongue
  6. 8. Filters blood in the body
  7. 10. Clear front part of eye
  8. 13. Stores urine
  9. 15. Muscle for breathing
  10. 16. Provides immunity against diseases
  11. 19. Defends the body from pathogens
  12. 20. Processes nutrients and detoxifies
  13. 21. Produces insulin