The Respiratory System
Across
- 2. the muscle that's responsible for inflating and deflating the lungs
- 4. odourless gas produced by burning carbon and organic compounds and by respiration
- 7. small air tubes that connect the bronchus to the alveoli
- 8. pipe that sends air to the lungs
- 10. How air goes into your body
- 11. blood vessels
Down
- 1. movement of molecules from high concentration to low concentration
- 3. its the organ that collects air
- 5. air that goes inside the lungs so we can breathe
- 6. air sacs that exchange oxygen and carbon dioxide in the blood
- 7. found at the end of the trachea and splits the air into each lung
- 9. bones that surrounds and protect your lungs and heart