Across
- 3. tubes that split off the bronchi
- 6. carries air from larynx to lungs (windpipe)
- 7. the two tubes that split off from trachea
- 8. the air we breathe is 78% this gas
- 10. is shared with the digestive system
Down
- 1. tiny sacs covered in capillaries that allow gas exchange
- 2. process in which glucose and oxygen undergo a series of reactions to release energy
- 4. muscle that moves down when lungs fill with air
- 5. also known as the voice box
- 9. this is where mucus and cilia trap and filter dirt