Across
- 2. Main tube that air first enters into the respiratory system.
- 4. Process of breathing oxygen into our lungs.
- 8. Small tiny air filled sacs that exchange oxygen for carbon dioxide.
- 9. Our left lung is slightly smaller because it needs room for this.
- 12. These form the rings around the trachea that keeps it open instead of collapsing.
Down
- 1. Tiny passageways that carry oxygen from the bronchi to the alveoli, they are as small as a strand of hair.
- 3. Process of breathing carbon dioxide (waste) out of our lungs.
- 5. Small flap that covers our trachea so that when we swallow our food goes into our esophagus and stomach instead of our lungs.
- 6. Attached to the trachea, has a left and right side that channels air into each lung.
- 7. Dome shaped muscle at the bottom of the respiratory system that helps us inhale and exhale.
- 10. The color of sick, unhealthy lungs usually from smoking.
- 11. The color of healthy lungs.