Respiratory System

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Across
  1. 2. brings air to lungs quicker than nose
  2. 4. substance in red cells used for transportation
  3. 6. passage from nasal cavity to esophagus
  4. 7. splits into three areas in lungs
  5. 8. large sponge like organ
Down
  1. 1. allows for gas exchange
  2. 3. conduct air into alveoli
  3. 5. passage for air to go in and out of lung
  4. 9. warms and filters air before entering lungs