The Respiratory System

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Across
  1. 1. relaxes during exhalation
  2. 3. Delivers oxygen to the alveoli
  3. 7. The process of breathing in
  4. 10. Move the chest up and out during inhalation
  5. 12. The gas needed for respiration
Down
  1. 2. Site of Gaseous Exchange
  2. 4. The Process of breathing out
  3. 5. The gas that exits through the lungs.
  4. 6. Delivers oxygen to each lung.
  5. 8. Carries oxygen from the nose to the lungs.
  6. 9. Moistens and Filters the air.
  7. 11. Protect the lungs