What happens in our bodies during a breath to cause the atmospheric pressure to suck the air?
In: Physics
You have a muscle sitting right below your lungs. When you breathe in, this muscle forcefully pulls down, which pulls on the lungs, expanding them. Once expanded, suddenly the little sacks inside the lungs have a lot more volume to them, but still the same amount of air, which means the pressure inside them dropped. Because of this, air starts rushing in from the high-pressure environment from outside to the low-pressure environment inside your lungs.
When you breathe out its the opposite. The muscle pushed up, squeezing the lungs and squeezing all the air out of them.
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