Across
- 2. oxygen into the body. 8 letters
- 4. out air from the lungs. 8 letters
- 7. substance carried by the blood to transport oxygen. 8 letters
- 9. muscle beneath the lungs, aids in breathing. 8 letters
- 10. main air passage to the lungs. 7 letters
Down
- 1. connecting the trachea to the bronchi. 6 letters
- 2. process of inhaling and exhaling air. 11 letters
- 3. muscle below the lungs that helps in breathing. 6 letters
- 4. of the trachea that lead into the lungs. 6 letters
- 5. region containing the vocal cords. 5 letters
- 6. air sacs in the lungs where gas exchange occurs. 6 letters
- 8. where oxygen and carbon dioxide exchange occurs. 4 letters