Respiratory System
Across
- 3. a large membranous tube reinforced by rings of cartilage
- 4. the action of breathing
- 6. the muscles between your ribs
- 8. a thin skeletal muscle that separates the abdomen from the chest
Down
- 1. tubes that carry air into the lungs and branch into smaller tubes
- 2. inhaling
- 5. a condition in which a persons airways become inflamed
- 7. a gas that living organisms need