Dog Respiratory System

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Across
  1. 5. A major airway branching off the trachea into the lungs.
  2. 9. Tiny, hair-like structures that sweep debris out of the airways.
  3. 10. The central compartment of the thoracic cavity containing the heart.
  4. 11. The throat, serving as a pathway for both air and food.
  5. 12. A flap of cartilage that covers the windpipe during swallowing.
  6. 14. The voice box, located above the trachea.
Down
  1. 1. The act of breathing air into the lungs.
  2. 2. A tiny branch of air tubes within the lungs.
  3. 3. A substance in the alveoli that prevents them from collapsing.
  4. 4. The windpipe, supported by cartilaginous rings.
  5. 6. The act of breathing air out of the lungs.
  6. 7. The serous membrane folding back on itself to form a two-layered membranous pleural sac.
  7. 8. The primary dome-shaped muscle used in inhalation.
  8. 13. Tiny air sacs in the lungs where gas exchange occurs.
  9. 15. The anatomical term for nostrils.