Respiratory System Crossword

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Across
  1. 2. The ..... membrane allows the lungs to move easily during ventilation
  2. 8. Letting air out of the lungs
  3. 9. Tube which leads from the trachea to each lung
  4. 10. Tiny hairs which move in a wavelike motion to remove dust and dirt
  5. 12. Filters the air we inhale and branches into the bronchi
  6. 13. Located at the back of the nose and mouth. Carries both food and air
  7. 14. The process of which a substance moves from a high concentration to a low concentration
Down
  1. 1. Muscle located under the lungs
  2. 3. Tiny sacs within the lungs where gaseous exchange occurs
  3. 4. Taking air into the lungs
  4. 5. Main organ of the respiratory system
  5. 6. Otherwise known as the voice box
  6. 7. Bone structure which protects the heart and lungs
  7. 11. A substance that warms and moistens the air as well as trapping foreign substances