Across
- 5. The total amount of air the lungs can hold
- 7. The process of breathing in
- 8. The volume of air moved in and out of the lungs during normal breathing
- 9. Main muscle used in breathing
Down
- 1. Tube that carries air from the throat to the lungs
- 2. The two branches of the trachea leading to the lungs
- 3. Tiny air sacs where gas exchange occurs
- 4. Gas taken in during inspiration
- 6. Site of oxygen and carbon dioxide exchange in muscles