Respiratory System

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Across
  1. 3. Contract and with ribs, they rise and increase volume in the thoracic cavity​
  2. 6. contracts for inhalation, relaxes for exhalation
  3. 9. blind air sacs where gas exchange occurs with capillaries
  4. 10. chest cavity​, from diaphragm to throat​
  5. 12. Protects internal organs
  6. 13. voice box
  7. 14. branch from trachea into each lung
Down
  1. 1. vibrate, as air is forced past, producing sound​
  2. 2. membranes surrounding and protecting lungs
  3. 4. carries air from pharynx to bronchi of lungs
  4. 5. warms, moistens and filters air
  5. 7. top of the larynx​ and covered by epiglottis when swallowing food​
  6. 8. where food and air cross to enter esophagus and trachea
  7. 11. move debris laden mucous out of the respiratory system​