Parts of Respiratory System

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Across
  1. 1. Passage for food and air
  2. 4. Two main tubes to each lung
  3. 5. Main organs of breathing
  4. 7. Muscle that helps inhale and exhale
  5. 9. Cavity Space that holds and protects lungs and heart; allows breathing movement
  6. 10. Filters, warms, and moistens air
Down
  1. 2. Air sacs where oxygen and carbon dioxide are exchanged
  2. 3. Smaller air passages inside lungs
  3. 6. Windpipe; carries air to lungs
  4. 8. Secondary air entry