Respiratory System

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Across
  1. 2. When we inhale, the diaphragm ___________
  2. 6. The process of forcing air out of the lungs
  3. 7. Space between the wall of chest cavity and lung fills with air
  4. 9. Air sacs where gas exchange occurs
  5. 11. The process of bringing air into the lungs
  6. 13. Lung infection which leads to fluid in the lungs
  7. 14. Sheet of muscle that separates organs of the chest from the abdominal cavity
  8. 15. In high altitudes, breathing rate _______
  9. 16. Windpipe
  10. 17. One passageway through which air enters and leaves our body
Down
  1. 1. This is usually a response to things such as exercise, allergies, or cold air
  2. 2. This gas has a significantly stronger affinity for hemoglobin than oxygen
  3. 3. Red blood cells contain this which binds oxygen
  4. 4. Nerve impulses here control breathing patterns
  5. 5. Inflammation or swelling of the bronchi
  6. 8. This flap prevents food from entering the trachea when swallowing
  7. 10. Oxygen reacts with nutrients in mitochondria to produce this
  8. 12. Process of taking in oxygen and releasing carbon dioxide