Gif of the Day: Non-Smoker's Lungs vs. Smoker's lungs

Smoking GIF

 Here is an amazing gif of two sets of lungs being filled with air. One pair was that of a smoker and the other was that of a non-smoker. Can you guess which is which?

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GIF comparing the inflation of a smoker's lungs to that of a regular person's.
via GIF

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gifs health smoking science biology