The respiratory bronchioles and the alveolar ducts are responsible for 10% of the gas exchange.

There are five or six alveolar sacs associated with each alveolar duct.

In human anatomy, respiratory bronchioles exists proximal to the alveolar ducts.

Alveolar ducts are distal continuations of the respiratory bronchioles.

Latter divisions including the respiratory bronchiole, alveolar ducts and alveoli, are specialized for gas exchange.

Distal terminations of alveolar ducts are atria which then end in alveolar sacs.

Terminal bronchioles in turn divide into respiratory bronchioles which divide into alveolar ducts.

Paraseptal emphysema is a type of emphysema which involves the alveolar ducts and sacs at the lung periphery.

The alveoli are located in the respiratory zone of the lungs, at the distal termination of the alveolar ducts and atria.

A characteristic change is muscular hypertrophy and hyperplasia, which affects not only the bronchioles and alveolar ducts, but also the media of the pulmonary arteries.

Exchange of gases between the air in the lungs and the blood in the capillaries occurs across the walls of the alveolar ducts and alveoli.

Asbestosis is the scarring of lung tissue (around terminal bronchioles and alveolar ducts) resulting from the inhalation of asbestos fibers.

Organizing pneumonia refers to organized swirls of inflammatory tissue filling the small spherical units of the lungs referred to as alveoli and the alveolar ducts.

The lung parenchyma is strictly used to refer solely to alveolar tissue with respiratory bronchioles, alveolar ducts and terminal bronchioles.

The alveolar ducts and alveoli consist primarily of simple squamous epithelium, which permits rapid diffusion of oxygen and carbon dioxide.

Bronchiolitis obliterans with organized pneumonia can ensue when granulation tissue accumulates in the terminal airways and alveolar ducts during the body's reparative process.

Alveolar ducts are tiny ducts that connect the respiratory bronchioles to alveolar sacs, each of which contain a bunch of alveoli (the balls).

Histologically, cryptogenic organizing pneumonia is characterized by the presence of polypoid plugs of loose organizing connective tissue (Masson bodies) within alveolar ducts, alveoli, and bronchioles.

The conducting zone contains the trachea, the bronchi, the bronchioles, and the terminal bronchioles The respiratory zone contains the respiratory bronchioles, the alveolar ducts, and the alveoli.

The virus replicates in epithelial tissues including salivary glands, oropharynx, stomach, esophagus, intestines, trachea, nasopharynx, renal tubules, bladder, pancreas, alveolar ducts, and sebaceous ducts from the muzzle.

Found in the lung parenchyma, the pulmonary alveoli are the terminal ends of the respiratory tree, which outcrop from either alveolar sacs or alveolar ducts, which are both sites of gas exchange with the blood as well.

The segmental bronchi divide into many primary bronchioles which divide into terminal bronchioles, each of which then gives rise to several respiratory bronchioles, which go on to divide into two to 11 alveolar ducts.