The Respiratory System

123456789
Across
  1. 2. Gas exchange occurs through..?
  2. 4. What does it add and remove from the blood?
  3. 6. Where does it connect to the circulatory system?
  4. 7. What helps increase or decrease the volume of the lungs?
  5. 8. Where can tuberculosis spread?
Down
  1. 1. System What other system does it connect to?
  2. 3. What helps remove waste and restore balance in the body?
  3. 5. What can help diagnose both tuberculosis and SARS?
  4. 9. Severe Acute Respiratory Syndrome