NEET PG DENTAL EXAM

Detailed explanation-1: -Listen to pronunciation. (al-VEE-oh-ly) Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs). The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.

Detailed explanation-2: -They are thin, squamous, and flat epithelial lining cells that form the structure of the alveoli. They have long cytoplasmic extensions that cover beyond 95% of the alveolar surface. The thin lining enables a fast diffusion of gas exchange between the air in the alveoli and the blood in the surrounding capillaries.

Detailed explanation-3: -While each individual alveolus appears small and insignificant, the combined surface area of multiple small pockets is much higher than the surface area of a single, large cavity. Thus, the alveolar sacs work to increase surface area and subsequently the rate of gas exchange within the body.

Detailed explanation-4: -A pulmonary alveolus (plural: alveoli, from Latin alveolus, “little cavity"), also known as an air sac or air space, is one of millions of hollow, distensible cup-shaped cavities in the lungs where pulmonary gas exchange takes place.