Respiratory system

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Across
  1. 3. Difficult / laboured breathing
  2. 4. A thin layer of tissue that covers the lungs and lines the interior wall of the chest cavity
  3. 9. This structure receives air from nasal cavity
  4. 10. Ability of the lungs to expand
  5. 11. The volume of air that can be blown out (forcefully) in one second
  6. 12. Olfactory epithelium are involved in this special sense
  7. 14. Elastic lung tissue naturally wants to...
  8. 15. Bronchoconstriction causes airway resistance to...
  9. 16. The approximate FEV1/FVC ratio in health
  10. 17. Oxygen binds to this protein allowing efficient transport through the blood
  11. 18. Right lung has this many lobes
Down
  1. 1. Main muscle group involved in inhalation
  2. 2. Simple set of tests to measure lung function
  3. 3. The sympathetic nervous system stimulates bronchi to do this
  4. 5. Substance that reduces lung surface tension
  5. 6. These cells produce mucus in the airways
  6. 7. Long-term medication used in the control of asthma symptoms
  7. 8. A major stimuli for asthma
  8. 13. Air filled spaces within bones of the skull that surround the nasal cavity