Respiratory System

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Across
  1. 5. A condition causing narrowed airways and difficulty breathing.
  2. 6. DIOXIDE: Waste gas removed from the body through exhalation.
  3. 9. The process of breathing in oxygen.
  4. 11. The process of breathing out carbon dioxide.
  5. 12. Dome-shaped muscle that controls breathing.
  6. 13. System that controls breathing rate based on oxygen needs.
  7. 14. Gas needed by cells for energy production.
  8. 15. Tiny air sacs in the lungs where gas exchange occurs.
Down
  1. 1. Another name for the windpipe.
  2. 2. The voice box containing the vocal cords.
  3. 3. Lung infection causing alveoli to fill with fluid.
  4. 4. Connects the nasal cavity to the larynx and esophagus.
  5. 7. Two large tubes branching from the trachea into each lung.
  6. 8. Spongy organs where gas exchange happens.
  7. 10. Transports oxygen from the lungs to the body.