1. https://courses.lumenlearning.com/boundless-ap/chapter/respiration-control/#:~:text=Involuntary%20respiration%20is%20any%20form,possible%2C%20such%20as%20during%20sleep.

2. http://www.physio-pedia.com/Muscles_of_Respiration

3. none

4. https://www.verywell.com/forced-expiratory-capacity-measurement-914900

5. https://www.sciencedirect.com/topics/medicine-and-dentistry/inspiratory-reserve-volume

6. http://medical-dictionary.thefreedictionary.com/functional+residual+capacity

7. http://www.merriam-webster.com/medical/residual%20volume

8. http://www.lung.org/lung-health-and-diseases/lung-disease-lookup/copd/learn-about-copd/how-serious-is-copd.html?referrer=https://www.google.com/

9. none

10. none

11. https://prohealthinsight.com/diseases-and-conditions/respiratory-disease/types-causes-restrictive-lung-disease/

12. none

13. none

14. http://emedicine.medscape.com/article/296301-overview

15. none

16. none

17. none

18. http://emedicine.medscape.com/article/1938228-overview

19. http://emedicine.medscape.com/article/1938228-overview

20. http://emedicine.medscape.com/article/1938228-overview#aw2aab6b2b2aa

21. none

22. none

23. none

24. none

25. none

26. http://www.ncbi.nlm.nih.gov/pubmed/20550071

27. none