Across
- 6. The process of producing energy using sugar and oxygen
- 7. tubes Tubes which leads from windpipe to each lung
- 8. Taking air into the lungs
- 10. Allows air to enter and leave the body
Down
- 1. A substance that moistens the air as well as trapping foreign substances
- 2. Muscle located under the lung
- 3. Bone structure which protects the heart and lungs
- 4. Filters the air we inhale and branches into the windpipe
- 5. Letting air out of the lungs
- 9. Main organ of the respiratory system