Respiratory and Circulatory systems crossword

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Across
  1. 2. passageway to the lungs
  2. 6. pumps blood throughout circulatory system
  3. 8. carries oxygen and carbon dioxide in the blood
  4. 10. distributes nutrients and carries waste in the blood
  5. 11. disease affecting the lungs
  6. 12. membrane connecting to the esophagus
  7. 13. The gas we breathe
  8. 14. fights infection in the blood
  9. 15. carry blood back to the heart
Down
  1. 1. form blood clots
  2. 3. pump blood from the heart
  3. 4. the gas we exhale
  4. 5. a cavity within a bone connecting to the nasal cavities
  5. 7. the process of taking air into the lungs and expelling it
  6. 9. carry blood to the cells