Across
- 4. The gas that is inhaled
- 6. the gas that is exhaled
- 8. a sheet of muscle underneath the lungs
- 9. process of air constantly moving through lungs
- 11. function is to protect chest
Down
- 1. The little tubes that transfer air to the alveoli for diffusion
- 2. Gas exchange takes place here
- 3. where the trachea splits into two parts into each lung
- 5. The ability to pass oxygen into blood
- 7. has stiff rings of cartilage to prevent collapsing
- 10. Two organs situated in chest and used for breathing