The muscles in the lungs and bronchial tree (or the windpipe and channels connecting it to the lungs) swell and tighten, ...

The tracheas and bronchial trees were opened and examined for ciliary ... the visible smoke from cigarettes is retained within the lungs in ordinary cigarette smoking. 8 In most smokers, a certain ...

Human lungs are a complex, fractal network of airways. “Imagine the lung as a tree and early-identified lung nodules as its fruit that typically grows on the treetops, but not on the trunk ...