The Respiratory System
Across
- 2. also known as the voice box
- 4. smallest branches of bronchi found within the lungs
- 8. relating to the lungs
- 11. a series of paired bones protecting the thoracic cavity and its organs
- 12. blood vessels carrying deoxygenated blood back to the heart
- 14. blood vessels carrying oxygenated blood away from the heart
- 15. movement of air out of the lungs
- 17. air-filled cavities within a bone
- 18. the muscle that contracts and relaxes to increase and decrease the volume of the thoracic cavity
Down
- 1. movement of taking air into the lungs
- 3. site of gas exchange between the lungs and bloodstream
- 5. microscopic vessels connecting the arterial and venous systems
- 6. paired organs of the respiratory system
- 7. also known as the windpipe
- 9. elastic cartilage that covers the larynx to prevent food from entering the lungs
- 10. major entrance and exit for the respiratory system
- 13. large airways branching from the trachea to the lungs
- 16. also known as the throat