Across
- 4. Voice box
- 5. A flap of tissue that separates air and food into different pipes
- 7. Two small bands of elastic tissue that stretch across the inside of the larynx
- 9. Windpipe
- 10. Human breathing system
- 12. Two long tubes that lead into the lungs
Down
- 1. Tiny air sacks at the end of bronchioles (look like little grapes)
- 2. Throat
- 3. Tiny hairlike structures in your nasal passage and respiratory system
- 4. Two saclike organs that replace the carbon dioxide in blood with oxygen
- 6. Breathing in
- 8. Strong, curved muscle attached below the lungs to the lower ribs and backbone. Separates the chest from the abdomen.
- 11. Breathing out