Bronchus

Bronchus
Bronchus
	The bronchi are conducting passages for air into the lungs.
	The bronchi form part of the lower respiratory tract
Details
System	Respiratory system
Artery	Bronchial artery
Vein	Bronchial vein
Nerve	Pulmonary branches of vagus nerve
Identifiers
Latin	bronchus
Greek	βρόγχος
MeSH	D001980
TA98	A06.4.01.001; A06.3.01.008
TA2	3226
FMA	7409
	Anatomical terminology

A bronchus (/ˈbrɒŋkəs/ BRONG-kəs; pl.: bronchi, /ˈbrɒŋkaɪ/ 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.

^ 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.
^ 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]}

[Netter-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]}

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