Easy breathing depends on the millions of delicate, air-filled sacs, known as alveoli, that are the site of gaseous exchange in the lungs. Each alveolus is composed of two distinct epithelial cell ...

Emphysematous changes refer to changes that may occur in the lungs as emphysema progresses and are visible on a CT scan. This may include changes in location or the type of damage in the lungs due to ...