Respiratory System

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Across
  1. 3. Breathing in
  2. 6. The _____ system takes in oxygen and gets rid of carbon dioxide
  3. 8. Branching tubes leading to the lungs
  4. 10. The gas needed by cells to break down food and release energy
  5. 11. dioxide Waste gas that needs to be removed from the body
  6. 12. Lines the respiratory tract and helps trap germs and dust
  7. 13. Main organ of the respiratory system
Down
  1. 1. Scientific word for windpipe
  2. 2. Muscular organ that helps pull the air into the lungs
  3. 4. Scientific word for voice box
  4. 5. Site where air enters the body and is cleaned by hairs and mucus
  5. 7. Microscopic air sacs in the lungs -looks like grapes
  6. 9. Breathing out