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I tried to find the academic definition of deep exhalation/inhalation but found nothing special.

I speculate that the correct definition is as follows:

Deep Exhalation: Exhaling the air with effort as much as possible, after a normal "inhalation".

Deep Inhalation: Inhaling the air with effort as much as possible, after a normal "exhalation".

The corresponding volumes of the air which is being moved inside respiratory tracts would be:

Vdeep exhalation = Tidal Volume + Expiratory reserve volume (ERV)

Vdeep inhalation = Tidal Volume + Inspiratory reserve volume (IRV)


But, in case we define them as below, the previous conclusion regarding the volumes turns wrong and consequently should be revised.

Deep Exhalation: Exhaling the air with effort as much as possible, after a normal "exhalation".

Deep Inhalation: Inhaling the air with effort as much as possible, after a normal "inhalation".

Vdeep exhalation = Expiratory reserve volume (ERV)

Vdeep inhalation = Inspiratory reserve volume (IRV)


I think it's impossible to assess without any subtle definition. I'm really confused.

Any help would be highly appreciated.

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  • $\begingroup$ You should investigate the concept of a collapsed lung. I think that may allow you to answer your question. $\endgroup$ – The Nate Jul 15 at 8:52
  • $\begingroup$ @TheNate Thank you. I'll give it a try. In the meantime, possible to let me know if there's a more active biology forum to ask questions? It seems Stackexchange is not too crowded by biologists as much as by developers! $\endgroup$ – Marelbiker Jul 18 at 6:30

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