Across
- 4. Tubes branch into - tubes in the lungs
- 7. Two tubes trachea branches into
- 8. Moves up or down as air moves in and out of body
- 10. Taking in oxygen and breathing out CO2
- 12. sacs in lungs where gas exchange occurs
- 13. Windpipe- carries air from mouth to lungs
- 14. Produces sound
Down
- 1. The gas that we inhale
- 2. Back of throat, above larynx
- 3. Vessels surrounding the alveoli
- 5. Filters air moving into body
- 6. Breathing out
- 9. One of the waste products from the lungs
- 11. Breathing in
- 14. Structures in the chest cavity that fill with air