Across
- 4. Sensors that detect changes in blood pH and gas levels.
- 5. Tiny air sacs in the lungs where gas exchange occurs.
- 10. Essential gas for cellular respiration.
- 13. Throat; passageway for air and food.
- 14. Substance that reduces surface tension in the alveoli.
- 15. Narrowing of the airways in the lungs.
- 17. Primary muscle involved in breathing.
- 18. Main organs of the respiratory system.
- 20. Ability of the lungs to return to their original shape after stretching.
Down
- 1. Process of delivering blood to the capillary bed in tissue.
- 2. Membrane surrounding the lungs and lining the chest cavity.
- 3. Outer layer of the pleura attached to the chest wall.
- 6. Inner layer of the pleura covering the lungs.
- 7. Voice box located above the trachea.
- 8. Abnormal change in voice sounds heard during auscultation.
- 9. Tiny blood vessels where gas exchange with alveoli occurs.
- 11. Opposition to airflow in the respiratory tract.
- 12. Windpipe that connects the larynx to the bronchi.
- 16. Measure of the lung's ability to stretch and expand.
- 19. Major air passages that branch from the trachea into the lungs.