The disease in which there is a breakdown of thin walls of alveoli:

Explanation

In emphysema, the inner walls of the air sacs are damaged, causing them to eventually rupture. This creates one larger air space instead of many small ones and reduces the surface area available for gas exchange. The main cause of emphysema is long-term exposure to airborne irritants. •In Asthma, the air passages in the lungs become narrow due to inflammation and tightening of the air passage. •Tuberculosis is due to bacterial infection which spreads through tiny droplets from the cough or sneeze of an infected person. •Cancer is due to a mutation in genes.