The main role of the lungs is to transfer life-giving oxygen into the blood supply, but they also have other functions, including helping regulate blood pressure. Learn about the lung structure ...

What Are Pulmonary Function Tests (PFTs)? Pulmonary function tests (PFTs) are lung tests. They show how well your lungs work. They’re noninvasive, which means that the doctor doesn’t cut you ...

Karel F. Liem, Form and Function of Lungs: The Evolution of Air Breathing Mechanisms, American Zoologist, Vol. 28, No. 2 (1988), pp. 739-759 ...

The hilum — or root — functions much like a plant root, securing each lung in place and providing a channel for energy to pass through.