Across
- 1. Small airway branches leading to the alveoli
- 5. Breathing air out
- 8. Essential gas for respiration
- 11. Tiny air sacs for gas exchange in the lungs
- 12. Your voice box
Down
- 2. Breathing air in
- 3. Area between the lungs
- 4. Muscle involved in breathing, found below the lungs
- 6. Main branches of airways connected to the trachea
- 7. The windpipe
- 9. Throat area shared by the digestive and respiratory systems
- 10. Membrane surrounding the lungs