Respiratory System Crossword

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Across
  1. 5. Main branches off of the trachea into each lung.
  2. 6. The passage for air in the nose.
  3. 11. The passage for air in the mouth.
Down
  1. 1. Tiny sacs where gas exchange occurs.
  2. 2. The right organ has 3 lobes, and the left organ has 2 lobes.
  3. 3. The passageway between oral and nasal cavities.
  4. 4. Smaller branches off of the bronchi.
  5. 7. The "voice box", contains the vocal chords.
  6. 8. Flap of tissue that closes during swallowing.
  7. 9. Also known as the windpipe.
  8. 10. Tiny vessels that allow for gas exchange at the alveoli.