Human Respiratory System

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Across
  1. 3. The process of taking air into the lungs.
  2. 7. Tiny air sacs in the lungs where gas exchange occurs.
  3. 9. The process of releasing air from the lungs.
  4. 10. The tube that carries air to the lungs.
Down
  1. 1. Small branches of bronchi inside the lungs.
  2. 2. Tube that divides into bronchi.
  3. 4. Part of the respiratory system where air enters first.
  4. 5. The large muscle at the base of the chest cavity.
  5. 6. Dome-shaped muscle that helps in breathing.
  6. 8. The two organs used for breathing.