- Secondary bronchus
Infobox Anatomy
Name = PAGENAME
Latin = bronchi lobares
GraySubject =
GrayPage =
Caption = 1. Trachea
2.Mainstem bronchus
3. Lobar bronchus
4. Segmental bronchus
5.Bronchiole
6.Alveolar duct
7. Alveolus
Caption2 = Front view of cartilages of larynx, trachea, and bronchi.
System =
MeshName =
MeshNumber =
DorlandsPre = b_23
DorlandsSuf = 12198332Secondary bronchi (also known as lobar bronchi) arise from the primary bronchi, with each one serving as the airway to a specific lobe of the lung.
tructure
They have relatively large lumens that are lined by
respiratory epithelium . There is asmooth muscle layer below the epithelium arranged as two ribbons of muscle that spiral in opposite directions. This smooth muscle layer containsseromucous gland s. Irregularly arranged plates ofhyaline cartilage surround the smooth muscle. These plates give structural support to thebronchus and maintain the patency of the lumen.econdary bronchi of
left lung * superior lobe bronchus
* inferior lobe bronchusecondary bronchi of
right lung * superior lobe bronchus (or
eparterial bronchus )
* middle lobe bronchus
* inferior lobe bronchus
=AdditionalReferences
* Gartner, Leslie P. and James L. Hiatt. "Color Atlas of Histology, 3rd ed." (2000). ISBN 0-7817-3509-2
* Gartner, Leslie P. and James L. Hiatt. "Color Textbook of Histology, 2nd ed." (2001). ISBN 0-7216-8806-3External links
* - "The divisions of the bronchus."
*
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