MICROANATOMY

Detailed explanation-1: -Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs).

Detailed explanation-2: -The air moves through a tiny duct (alveolar duct) and finally enters an individual alveolus (the singular of alveoli).

Detailed explanation-3: -At the end of each bronchiole are tiny air sacs called alveoli. This is the place where the exchange of oxygen and carbon dioxide actually happens. Each person has hundreds of millions of alveoli in their lungs. This network of alveoli, bronchioles, and bronchi is known as the bronchial tree.

Detailed explanation-4: -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.

Detailed explanation-5: -In emphysema, the inner walls of the lungs’ air sacs (alveoli) are damaged, causing them to eventually rupture.