Respiratory System

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Across
  1. 5. What could be threatened if we didn't breathe out carbon dioxide?
  2. 7. What would cells do if oxygen level got too low?
  3. 8. and Chest Cavity Where is the respiratory system located?
  4. 9. Breathing this in gives cells energy to power life-sustaining reactions
Down
  1. 1. These are tiny air sacs in the lungs where gas exchange occurs
  2. 2. System Inhaling oxygen and exhaling carbon dioxide is the main function of this system
  3. 3. and Respiratory What two components is the respiratory system divided into?
  4. 4. These are tiny blood vessels
  5. 6. What is another name for voice box?
  6. 7. What is another name for throat?