Across
- 1. tiny hair which moves in a waves
- 4. located at the back of the nose
- 7. system include heart,veins and blood
- 10. lines the inside of blood vessels
- 11. Airways lead from the trachea into the lungs
- 13. inhales oxygen and exhales carbon dioxide
- 14. breakdown of food into small molecules
- 17. system that includes lungs and trachea
- 19. substance moves from High tolow concentration
- 20. letting Air out of the lungs
- 21. fine branching blood vessels
Down
- 2. otherwise known as voice box
- 3. filter the air we inhale
- 5. dome shaped muscles located under the lung
- 6. hollow spaces in the bones
- 8. bone structure which protects heart,lungs
- 9. main organ in respiratory system
- 12. taking Air into the lungs
- 15. Enters your body
- 16. where two bones meet
- 18. tiny sacs within the lungs