Lungs

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Across
  1. 4. A sheet of muscle under the lungs.
  2. 6. The main airway.
  3. 7. This splits from the main airway.
  4. 9. Start of the Oxygen's journey.
Down
  1. 1. Stops food going in our lungs
  2. 2. The name of the system the lungs are a part of.
  3. 3. This is the smallest airway.
  4. 5. Gas Exchange Place.
  5. 8. The chemical byproduct of glucose and oxygen.