Respiratory System Crossword Puzzle

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Across
  1. 5. A paranasal sinus that aids in moistening the air
  2. 6. Tiny air sacs where gas exchange occurs
  3. 7. Cancer-causing substances
  4. 9. A serious bacterial infection that spreads through airborne droplets
  5. 10. Diaphragm relaxes and moves up while the ribs move down and in
  6. 12. Contains only two lobes
Down
  1. 1. Fluid around the lungs
  2. 2. When abnormal lung cells multiply rapidly
  3. 3. When bacteria become resistant to standard antibiotics
  4. 4. Small flap of cartilage that seals off the airway
  5. 8. Diaphragm contracts and moves down while the ribs move up and out
  6. 11. Chronic condition in which your airways inflame