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Across 1. deficiency of oxygen 3. where oxygen and carbon dioxide are exchanged 9. measurement of amount of air taken into and expelled from the lungs 11. a branch of the trachea 14. suprical puncture of the chest cavity 16. inflammation of the throat 17. normal respiration 18. form of pneumoconiosis 19. inflammation of the nasal membrane 20. surgical removal of a lung

Down 2. absence of voice 4. chronic pulmonary disease characterized by an increase in the size and destructive changes of alveoli 5. painful larynx 6. pertaining to the nose 7. incomplete expansion of a lung 8. slow breathing 10. agents used to dissolve mucus 12. breathing is uncomfortable except when sitting or standing 13. agents used to prevent coughing 15. pertaining to the diaphragm