How long does the air from a babys first breath remain in it's lungs?

Question

Since we all know that the lungs never fully deflate throughout life, how long does that air from that breath remain in the body, before being finally completely breathed out? Or does it ever get breathed out fully?

Answer 1

it could be possible that it could be out after a couple of breath cuz when you breath in the air your breathing in is being sucked down to the bottom, and the air that was already there pushed to the top, but thats just an idea, not really sure

Answer 2

There is a dead space of air in the lungs on top of the tidal volume. However, turbulence and diffusion and solution in plasma mean that the remaining original air molecules will decrease exponentially with each breathe. So I suppose there could still be a handful of molecules still there when you die.

Answer 3

Certainly it diffuses. I would think after a few breathes that no molecules of the "original breath" remain.

Interesting question, never thought about it

Answer 4

seems like you answered your self
if the lungs are never deflated a fraction of> that breath< is always in the lungs., isn,t it?

Answer 5

good question, i would imagine that after a couple of breaths the initial breath in the lungs would be breathed out, or would it ???? who knows for sure?????