Across
- 4. Two spongy organs that occupy the chest cavity
- 6. Muscle separating chest and abdominal cavities
- 7. Muscles between the ribs
- 9. A poisonous gas, no taste or smell
- 10. They protect the chest cavity
Down
- 1. Process of breathing
- 2. Condition, Insufficient oxygen in body tissues
- 3. Surrounds and protects the lungs
- 5. You may do this when object is stuck in your throat
- 8. An average man’s lungs can hold ___ litres of air