The Respiratory System

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Across
  1. 3. A section of a lung. The right lung has three lobes, and the left lung has two.
  2. 6. The throat; a passage that carries air from the nose and mouth to the larynx.
  3. 7. An opening that allows air to enter and leave the body.
  4. 10. A large muscle beneath the lungs that helps you breathe in and out.
  5. 11. Tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged.
  6. 12. An organ where oxygen enters the blood and carbon dioxide is removed.
  7. 13. cavity The hollow space inside the nose where air is filtered, warmed, and moistened.
Down
  1. 1. Filters, warms, and moistens air before it reaches the lungs.
  2. 2. Tiny hair-like structures that move mucus and trapped dust out of the airways.
  3. 4. Two large air tubes that carry air from the trachea into each lung.
  4. 5. The windpipe; a tube that carries air from the larynx to the bronchi.
  5. 8. A flap that covers the windpipe when you swallow to stop food entering the lungs.
  6. 9. The voice box that contains the vocal cords and connects the throat to the trachea.