Across
- 3. space at the back of the mouth and nose
- 6. small air sacs where gas exchange occurs in lungs
- 8. occurs between blood and body tissue
- 10. fibrosis mucus builds up in the lungs
- 11. inflammation of the respiratory tract
- 12. part of the brain that controls respiration
Down
- 1. general term for lack of oxygen in the tissues
- 2. flap that closes during swallowing
- 4. occurs between air and lungs
- 5. childhood disease known as whooping cough
- 7. keeps the trachea stiff so it doesn't collapse
- 9. triangular opening within the larynx, vocal cords