Bronchiole


Bronchiole

Infobox Anatomy
Name = Bronchiole
Latin =
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Caption = Diagram of the alveoli with both cross-section and external view.


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DorlandsPre = Bronchioles
DorlandsSuf = A04.411.125
The bronchioles or bronchioli are the first airway branches that no longer contain cartilage. They are branches of the bronchi, and are smaller than one millimeter in diameter.

There are no glands or cartilage in any of the bronchioles, and the epithelial cells become more cuboidal in shape.

The bronchioles terminate by entering the circular sacs called alveoli.

Control of airflow resistance and air distribution in the lungs is controlled by the bronchioles.

Pathology

Bronchospasm, a life-threatening situation, occurs when the smooth muscular tissue of the bronchioles constricts, severely narrowing their diameter. Bronchospasm is commonly treated by oxygen therapy and bronchodilators.

The medical condition of inflammation of the bronchioles is termed bronchiolitis. Diseases of the bronchioles include asthma, bronchiolitis obliterans, respiratory syncytial virus infection, and influenza.


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External links

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Look at other dictionaries:

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  • Bronchiole — Bron chi*ole, n. (Anat.) A minute bronchial tube. [1913 Webster] …   The Collaborative International Dictionary of English

  • bronchiole — Mod.L., from dim. of bronchia (see BRONCHIAL (Cf. bronchial)) …   Etymology dictionary

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  • bronchiole — [bräŋ′kē ōl΄] n. [ModL bronchiolum, dim. of LL bronchia, the bronchi] any of the small subdivisions of the bronchi: see LUNG …   English World dictionary

  • bronchiole — One of approximately six generations of increasingly finer subdivisions of the bronchi, all less than 1 mm in diameter, and having no cartilage in its wall, but relatively abundant smooth muscle and elastic fibers. SYN: bronchiolus [TA].… …   Medical dictionary

  • Bronchiole — Sur les autres projets Wikimedia : « Bronchiole », sur le Wiktionnaire (dictionnaire universel) Les bronchioles sont les premières branches des voies respiratoires qui ne contiennent plus de cartilage. Elles sont des prolongements… …   Wikipédia en Français

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  • bronchiole — UK [ˈbrɒŋkɪəʊl] / US [ˈbrɑŋkɪoʊl] noun [countable] Word forms bronchiole : singular bronchiole plural bronchioles medical a very small tube inside your lungs that is connected to one of your bronchi (= the two main tubes inside each lung) …   English dictionary


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