Respiratory system

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Across
  1. 1. This is created as air passes past vocal cords.
  2. 3. Small tubes that carry air into the lungs.
  3. 9. Where air first gets sent to the left or right.
  4. 10. Small sacs where O and CO2 are exchanged.
  5. 11. The respiratory system helps you...
Down
  1. 2. Contains tiny hairs to purify the air we inhale.
  2. 4. The chemical element that our lungs extract.
  3. 5. The muscle that helps us breathe.
  4. 6. Another word for breathing out.
  5. 7. Another word for breathing in.
  6. 8. Otherwise known as the windpipe.