Digestive, Respiratory, and Circulatory/Pulmonary systems

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Across
  1. 3. The two main tubes into the lungs
  2. 5. Anything to do with the lungs
  3. 6. Helps break down fats
  4. 8. Carries blood away from the heart
  5. 9. To breathe out
  6. 11. The "good bugs" in the gut
  7. 14. Starts the process in the mouth
  8. 17. Tiny air sacs
  9. 18. Good stuff we get from food
  10. 19. How fast you burn energy
  11. 24. The flow of blood
  12. 26. Where absorption happens
  13. 28. The sound of valves closing
Down
  1. 1. The top chambers of the heart
  2. 2. The bottom chambers of the heart
  3. 4. Tiny blood vessels in the lungs
  4. 5. The beat you feel in your wrist
  5. 7. The windpipe
  6. 9. Chemicals that break down food
  7. 10. The tube to the stomach
  8. 12. Help the blood to clot
  9. 13. The muscle that moves the lungs
  10. 15. Sugar used for energy
  11. 16. The liquid part of blood
  12. 20. The gas we need to live
  13. 21. To breathe in
  14. 22. Carries blood back to the heart
  15. 23. The whole breakdown process
  16. 25. The path air takes
  17. 27. Specifically Carbon Dioxide, the waste gas