While smoking cigarattes, the smoke we inhale and the smoke we puff after inhaling are the same if not what is the difference?
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It’s mostly the same, except that the concentration of oxygen, nicotine, and some other products is lower in the smoke you exhale and the CO2 concentration would be higher.
Some of the nicotine, and other tobacco burining byproducts will get abosorbed into your blood at a molecular level while the smoke is in your lungs, same goes for part of the oxygen, and the inverse for CO2. The stuff that makes smoke visible are small suspended soot and combustion product particles, they themselves are generally too large to diffuse into your blood stream, and just stay in the smoke
The smoke you inhale has lots of stuff in it.
When you inhale it, a lot of that stuff sticks to your lungs.
When you exhale, the smoke you blow out doesn’t have those things in it anymore, because they are stuck to your lungs (and the inside of your mouth, and your throat, etc).
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