Respiratory anatomy and physiology

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