Respiratory system

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Across
  1. 2. voice box located between the pharynx and the trachea
  2. 6. tiny air sacs in lungs where gas exchange occurs
  3. 8. part of the throat behind the mouth and nasal cavity space inside
  4. 10. a flap that covers the opening of the larynx during swallowing
  5. 11. a large muscle below the lungs that helps with breathing
Down
  1. 1. membrane that lines the lungs and chest cavity
  2. 3. smaller airways that lead to the alveoli
  3. 4. the tubes that branch from the trachea into the lungs
  4. 5. wind pipe carries are from the larynx to the bronchi
  5. 7. primary organ of the respiratory system
  6. 9. cavity space inside the nose where air enters