Lungs are spongy, filled with tiny air sacs which give them a spongy texture. And our lungs are really large in surface area.

Cold, dry air enters the lungs, causing irritation, which can lead to bronchospasm. That’s when airways tighten and narrow and you may start feeling shortness of breath. For those people with ...

in the fluid-filled air spaces of the lungs were the same in wild-type and NKCC1-deficient mice. This observation suggested that NKCC1 activity hindered neutrophil migration into the air spaces of ...

Healthy lungs look “empty” on an X-ray, because they are filled with air. But pneumonia fills the lungs with fluid. This means it’s usually very easy to see where pneumonia is affecting them ...