If lungs take in air, wouldn't that mean they inflate? My line of thinking would assume that lungs enlarge slightly as they fill with air. As you exhale, I'd also assume that they deflate and get slightly smaller.

I'm no doctor so I'm not sure what happens to air in the "void"

I remember a photo in a book. I believe it was John Trouts book on tracking deer ( Not for certain), where they removed the lungs and some guy had his mouth on the wind pipe and blew into the lungs inflating the lungs for the photo.

Anyone have that book?

All I know is we tracked that deer most of the day, that night and the following day. I was young and wanted that deer bad. Mostly went by tracks and upturnd leaves.

By the way, I think your post was confrontational.

This is where I saw the arrow on that deer I shot. I don't think the lungs are situated that high.