Across
- 2. small sacs; site of gas exchange
- 5. small blood vessels
- 6. windpipe
- 7. throat
- 10. muscles around the rib cage
Down
- 1. branch-like structures in the lungs
- 3. dome-shaped organ under the rib cage
- 4. voice box
- 8. where air enters the body
- 9. pair of organs inside the ribcage