Kesler Science - Respiratory System Crossword

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Across
  1. 3. The air sacs at the end of the bronchioles where gas exchange takes place.
  2. 6. The two major air passageways leading from the trachea to the lungs.
  3. 8. Also called the throat; the passage that leads from the oral and nasal cavity to the larynx
  4. 9. Muscle that pushes and pulls against the lungs.
  5. 10. The respiratory system begins in the _____ cavity
  6. 13. The action of breathing.
  7. 14. This gas is expelled out of the lungs during respiration.
Down
  1. 1. A flap of cartilage attached to the larynx that closes when food passes by.
  2. 2. This gas is taken in during respiration.
  3. 4. A hollow tube that connects the larynx to the right and left bronchus.
  4. 5. The smallest air passageways coming off the bronchi.
  5. 7. Air is taken in through the mouth in the oral ______.
  6. 11. Hollow muscular organ which holds the vocal cords and produces sound.
  7. 12. Carries out the exchange of gases while we breathe.