PATHOLOGY

Detailed explanation-1: -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: -Oxygen diffuses from the alveoli into the capillaries, which carry it out of the lungs and to the rest of the body; carbon dioxide diffuses into the alveoli and is then exhaled out of the body. The respiratory membrane is the barrier through which oxygen and carbon dioxide are exchanged.

Detailed explanation-3: -Lung alveoli are found in the acini at the beginning of the respiratory zone. They are located sparsely in the respiratory bronchioles, lining the walls of the alveolar ducts. The alveoli are located in the alveolar sacs of the lungs in the pulmonary lobules of the respiratory zone.