The respiratory System

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Across
  1. 4. A respiratory illness
  2. 8. Muscle under ribs that help with breathing
  3. 9. Voice box
  4. 11. taking in air in the lungs
  5. 12. Tiny branches in the lungs
Down
  1. 1. A waste gas from respiration
  2. 2. breathing out air
  3. 3. Using oxygen and glucose to produce energy
  4. 5. Stops food from gong the wrong way
  5. 6. Takes air to the bronchi
  6. 7. Where gas exchange takes place in lungs
  7. 10. Allows both air and food to pass through this