Respiratory System

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Across
  1. 5. _____ cartilage is the largest layer of cartilage on the larynx
  2. 6. closes during swallowing to prevent food and liquids from entering the respiratory tract
  3. 8. contain a rich network of blood capillaries
  4. 11. branches off into the esophagus and trachea
Down
  1. 1. breathing
  2. 2. inspiration and expiration
  3. 3. allow air to be carried to both lungs
  4. 4. filter inhaled air to trap dust and pathogens
  5. 7. membrane that encloses each lung
  6. 9. voice box
  7. 10. divides the nose into 2 hollow spaces