About-Emphysema, a type of chronic obstructive pulmonary disease (COPD) is a chronic lung disease occurs due to damaged air sacs in the lungs (alveoli). Symptoms
Causes-It occurs due to damaged air sacs in the lungs (alveoli). The air sacs weaken and eventually break, which reduces the surface area of the lungs and the amount of oxygen that can reach the bloodstream. The main reasons are