ANATOMY

Detailed explanation-1: -(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: -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.

Detailed explanation-3: -The microscopic air sacs present in the lungs are called alveoli.

Detailed explanation-4: -Inhaled air passes through tiny ducts from the bronchioles into elastic air sacs (alveoli). The alveoli are surrounded by the alveolar-capillary membrane, which normally prevents liquid in the capillaries from entering the air sacs.

Detailed explanation-5: -The alveolar sacs function to transport fresh oxygen into the body and carbon dioxide out of the body. This process can be examined by understanding how a breath is brought in and exhaled. Air enters the body via the mouth or nose.