Bronchus

Bronchus
The bronchi are conducting passages for air into the lungs.
The bronchi form part of the lower respiratory tract
Details
SystemRespiratory system
ArteryBronchial artery
VeinBronchial vein
NervePulmonary branches of vagus nerve
Identifiers
Latinbronchus
Greekβρόγχος
MeSHD001980
TA98A06.4.01.001
A06.3.01.008
TA23226
FMA7409
Anatomical terminology

A bronchus (/ˈbrɒŋkəs/ BRONG-kəs; pl.: bronchi, /ˈbrɒŋk/ BRONG-ky) is a passage or airway in the lower respiratory tract that conducts air into the lungs. The first or primary bronchi to branch from the trachea at the carina are the right main bronchus and the left main bronchus. These are the widest bronchi, and enter the right lung, and the left lung at each hilum. The main bronchi branch into narrower secondary bronchi or lobar bronchi, and these branch into narrower tertiary bronchi or segmental bronchi. Further divisions of the segmental bronchi are known as 4th order, 5th order, and 6th order segmental bronchi, or grouped together as subsegmental bronchi.[1][2] The bronchi, when too narrow to be supported by cartilage, are known as bronchioles. No gas exchange takes place in the bronchi.

  1. ^ Netter, Frank H. (2014). Atlas of Human Anatomy Including Student Consult Interactive Ancillaries and Guides (6th ed.). Philadelphia, Penn.: W B Saunders Co. p. 200. ISBN 978-1-4557-0418-7.
  2. ^ Maton, Anthea; Jean Hopkins; Charles William McLaughlin; Susan Johnson; Maryanna Quon Warner; David LaHart; Jill D. Wright (1993). Human Biology and Health. wood Cliffs, New Jersey, USA: Prentice Hall. ISBN 0-13-981176-1.[page needed]