Respiratory system

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Across
  1. 2. This is a muscle to breath
  2. 5. It is small tubes in the body
  3. 6. Airway of the body
  4. 9. To smell and to breath
  5. 10. very thin blood vessels
  6. 11. Gas that doesn't have any smell or taste
Down
  1. 1. Movement of molecules high concentration to low concentration
  2. 3. The place where breathing organ
  3. 4. bags/sacs of air
  4. 5. The tube of lung
  5. 7. It is bones of chest
  6. 8. Air that humans cannot breathe and that plants need