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 ...

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 is limited to the bronchioles and does not extend into the alveoli. The clinical features of constrictive bronchiolitis consist of a chest radiograph that is often ...

PM 2.5 - particles of diameter less than 2.5 micrometers, is considered the most harmful because of its ability to travel ...