Yr10 Respiratory System

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Across
  1. 2. breathing out
  2. 4. Where gaseous exchange takes place in the lungs
  3. 6. Muscle under ribs that help us breathe
  4. 10. drug in cigarettes
  5. 11. gas we breathe in
  6. 12. how oxygen and carbon dioxide move through alveoli
  7. 13. tiny hair like parts that keep lungs clean
Down
  1. 1. wind pipe
  2. 3. pipe that splits off trachea to each lung
  3. 5. breathing in
  4. 7. muscles between ribs
  5. 8. branches of the bronchus
  6. 9. protect lungs