Across
- 1. common passage for food and air
- 5. made of elastic cartilage/prevents food into windpipe
- 8. made of cartilaginous rings that extend downward which than split into two bronchi
- 9. air passages that branch
Down
- 2. facilitates the exchange of oxygen and carbon dioxide molecules
- 3. Each lung has one (left and right)
- 4. includes hair follicles as a first line of defense
- 6. voice box
- 7. primary organ of respiration