What Your Lungs Really Look Like (You Won’t Expect This)

Every time you take a breath, your lungs activate around 700 million alveoli — tiny air sacs where oxygen enters your blood in less than a second.
The total surface area inside your lungs is large enough to cover a tennis court. And all of that… just to keep you alive.
But this system only works when everything is thin, clean, and flexible.
When smoke, pollution, or disease enters the lungs — things start to change.
Airways can narrow.
Alveoli can fill with fluid.
Damage can become permanent.
And in some cases, your lungs don’t stay pink… they turn gray.
The good news?
Your body can heal — but only up to a point.
Watch till the end to understand how your lungs really work… and what happens when they don’t.

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Видео What Your Lungs Really Look Like (You Won’t Expect This) канала Behind Science's