- Tertiary bronchus
Infobox Anatomy
Name = PAGENAME
Latin = bronchi segmentales
GraySubject =
GrayPage =
Caption = 1. Trachea
2.Mainstem bronchus
3. Lobar bronchus
4. Segmental bronchus
5.Bronchiole
6.Alveolar duct
7. Alveolus
Caption2 =
System =
MeshName =
MeshNumber =
DorlandsPre = b_23
DorlandsSuf = 12198382
The tertiary bronchi (also known as the segmental bronchi) arise from the secondary bronchi. Therespiratory epithelium lining their lumen is surrounded by a layer ofsmooth muscle . This layer is composed of two ribbons of smooth muscle that spiral in opposite directions. The smooth muscle layer is surrounded by irregular plates ofhyaline cartilage which help maintain the patency of the airway.Each of the tertiary bronchi serves a specific
bronchopulmonary segment . There are 10 tertiary bronchi in the right lung, and eight in the left.The tertiary bronchi get smaller and divide into
primary bronchiole s.
=AdditionalReferences
Gartner, Leslie P. and James L. Hiatt. Color Textbook of Histology, 2nd ed. (2001). ISBN 0-7216-8806-3
External links
*
* - "Pleural Cavities and Lungs: The Bronchi and Their Divisions" (1/2)
* - "Pleural Cavities and Lungs: The Bronchi and Their Divisions" (2/2)
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