翻訳と辞書 Words near each other ・ Bronaugh, Missouri ・ Bronbeek ・ Bronc Burnett ・ Bronc Peeler ・ Bronc riding ・ Bronchales ・ Bronchial artery ・ Bronchial brushing ・ Bronchial challenge test ・ Bronchial circulation ・ Bronchial hyperresponsiveness ・ Bronchial thermoplasty ・ Bronchial veins ・ Bronchial vessels ・ Bronchiectasis ・ Bronchiole ・ Bronchiolitis ・ Bronchiolitis obliterans ・ Bronchiolitis obliterans organizing pneumonia ・ Bronchitis ・ Bronchitis kettle ・ Broncho (band) ・ Broncho (disambiguation) ・ Broncho Billy Anderson ・ Broncho Billy Anderson filmography ・ Bronchoalveolar lavage ・ Bronchocela ・ Bronchocela cristatella ・ Bronchocela danieli ・ Bronchocela jubata Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Bronchiole ： ウィキペディア英語版 Bronchiole The bronchioles or bronchioli are the passageways by which air passes through the nose or mouth to the alveoli (air sacs) of the lungs, in which branches no longer contain cartilage or glands in their submucosa. They are branches of the bronchi, and are part of the conducting zone of the respiratory system. The bronchioles divide further into smaller terminal bronchioles which are still in the conducting zone and these then divide into the smaller respiratory bronchioles which mark the beginning of the respiratory region. == Structure == A pulmonary lobule is the portion of the lung ventilated by one bronchiole. Bronchioles are approximately 1mm or less in diameter and their walls consist of ciliated cuboidal epithelium and a layer of smooth muscle. Bronchioles divide into even smaller bronchioles, called ''terminal'', which are 0.5mm or less in diameter. Terminal bronchioles in turn divide into smaller respiratory bronchioles which divide into alveolar ducts. Terminal bronchioles mark the end of the conducting division of air flow in the respiratory system while respiratory bronchioles are the beginning of the respiratory division where actual gas exchange takes place. The diameter of the bronchioles plays an important role in air flow. The bronchioles change diameter to either increase or reduce air flow. An increase in diameter is called bronchodilation and is stimulated by either epinephrine or sympathetic nerves to increase air flow. A decrease in diameter is called bronchoconstriction and is stimulated by histamine, parasympathetic nerves, cold air, chemical irritants and other factors to decrease air flow. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bronchiole」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.