The lungs are designed to exchange gasses between the inspired air and the blood. They are like a series of separate bellows, so parts of the lungs will be usable in any position the body puts them. Although their outer surface area is relatively small, they provide a very large inner surface to exchange gasses. Both lungs are not identical, the right lung has three lobes, the left two.
“I had no intention of using the biological studies that I was doing in the teaching pursuit at all. Once I began to learn how we function, then it was obvious. If I saw phenomena existing in an individual in the way he uses his musculature, and I know that he cannot move air at that point, I may work with him a little bit as a therapist just to establish the air flow, to get him back into the use of the bellows activity that we have in respiration.”