What these tiny sacs in the lungs do and conditions that can affect them Medically reviewed by Susan Russell, MD Alveoli are tiny, balloon-shaped air sacs located at the end of the bronchioles ...

a: Gross anatomy of lung and thorax. b: Microscopic anatomy of bronchial wall. C: View of terminal airway and alveoli. d: Alveolar structure.

Constrictive bronchiolitis obliterans is an important respiratory illness because of its underlying irreversible fibrotic process, and is defined as concentric fibrosis in the bronchiolar ...

The big difference between these two conditions — and you might not be able to feel it — is which part of the respiratory system ... called alveoli, where oxygen passes into your blood.

The bronchi in the lungs split into smaller and smaller tubes called bronchioles. These end in microscopic air sacs called alveoli ... different parts of the respiratory system as shown here.

Bronchiole Each bronchus splits again and again into thousands of smaller tubes called bronchioles which take the air deeper into the lungs. Alveoli At the ends of bronchioles are tiny air sacs ...