body systems

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Across
  1. 3. Large flat muscle at the bottom of the chest
  2. 4. Lower chamber
  3. 6. the passage that direct air into Lungs
  4. 8. a tiny branch of air tubes
  5. 10. A muscular tube
  6. 14. Allows air to pass
  7. 15. Tiny sacs of lung tissue
Down
  1. 1. an organ that exchanges oxygen
  2. 2. airways in the Lungs
  3. 5. where digestion begins
  4. 7. Upper chamber
  5. 9. Connects arteries and veins
  6. 11. Forming scabs
  7. 12. Large muscular sac that continues
  8. 13. Direct air into lungs