The Respiratory System

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Across
  1. 4. bronchioles that end in microscopic sacs
  2. 5. the trachea branches into 2 narrower tubes
  3. 6. interacts with the respiratory system so you can breathe
  4. 8. contracts and relaxes and moves air in and out of the lungs
  5. 9. the main organs of the respiratory system
  6. 10. a flap of tissue at the lower end of the pharynx
Down
  1. 1. movement of air
  2. 2. a tubelike passageway at the top of the throat
  3. 3. a system of organs
  4. 7. air that passes from the pharynx into a triangle-shape