The bronchi in the lungs split into smaller and smaller tubes called bronchioles. These end in microscopic air sacs called alveoli. The process of ventilation as a series of changes in pressure ...

Carbon dioxide diffuses from the blood into the alveoli. These three features are particularly important to our lungs for efficient gas exchange. Most of them also apply to other exchange surfaces ...

The study suggests that repeated collapse and reopening of tiny alveoli -- air sacs in the lungs essential for breathing -- during mechanical ventilation may cause microscopic tissue damage, playing a ...