Respiratory System

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