Respiratory System

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Across
  1. 4. A gas you breathe out. It is a waste gas.
  2. 6. Common name for trachea.
  3. 8. Scientific name for windpipe.
  4. 9. Inhale and exhale.
  5. 10. You do this when something irritates your diaphragm.
  6. 14. You do this when you don't get enough oxygen to your blood.
  7. 15. All animals need this gas to make energy from food.
  8. 16. Breathe in.
  9. 19. You do this when something irritates your nose.
Down
  1. 1. When we exhale we breathe this plus carbon dioxide.
  2. 2. One of the two places where air enters your body.
  3. 3. Fish have these instead of lungs.
  4. 5. What we breathe.
  5. 7. Large muscle that controls the lungs.
  6. 9. Two tubes that connect the trachea to the lungs.
  7. 11. This prevents food from going down your lungs.
  8. 12. The place where oxygen enters the blood
  9. 13. You do this when something irritates your trachea or bronchi.
  10. 17. Breathe out.
  11. 18. One of the places where air enters your body.