Cells unit crossword

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Across
  1. 3. organ that changes ammonia to urea
  2. 5. organ that produces insulin
  3. 7. where photosynthesis takes place
  4. 9. produce antibodies
  5. 12. sacks of air that inhale oxygen and exhale carbon dioxide
  6. 13. two tubes that split from the trachea
  7. 16. the re-crystalizing of salt and sugar in your kidney
  8. 17. prevents grinding of bones
  9. 20. the organ that releases metabolic waste and excess water
  10. 21. system that carries messages from the brain to the rest of the body
  11. 25. produces energy for a cell
  12. 29. organ that forces food down the pharynx
  13. 31. makes blood cells
  14. 32. tiny branch-like tubes that split from the bronchi
  15. 34. vessels that carry blood to the heart
  16. 35. the process of water molecules moving from high to low concentration
Down
  1. 1. joins muscle to bone
  2. 2. same size as your fist, shaped like a bean
  3. 4. thin flap that prevents food from going down the trachea
  4. 6. the system responsible for removing waste
  5. 8. grape-like structures at the end of the bronchioles
  6. 10. long tube that goes from the pharynx to the stomach
  7. 11. circular muscle at the end of the urethra
  8. 14. strong muscle that pumps blood around the body
  9. 15. organ that produces testosterone
  10. 18. also known as windpipe
  11. 19. what the lungs exhale
  12. 22. vessels that carry blood away from the heart
  13. 23. the outermost layer of a plant cell
  14. 24. organ that stores bile
  15. 26. the balancing of fluids, body temperature and blood pressure
  16. 27. the strong muscle below the lungs
  17. 28. organ that contains hydrochloric acid
  18. 30. organ that produces estrogen
  19. 33. also known as the swine flu