segmental bronchus in dogs

The tertiary bronchi (also known as the segmental bronchi) arise from the secondary bronchi. The respiratory epithelium lining their lumen is surrounded by a layer of smooth 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 of hyaline 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 bronchioles. [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the segmental bronchus is

The tertiary bronchi (also known as the segmental bronchi) arise from the secondary bronchi. The respiratory epithelium lining their lumen is surrounded by a layer of smooth 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 of hyaline 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 bronchioles. [WP,unvetted]. The atlas records it as a organ at the organ scale in the dog.

Where the segmental bronchus is

It sits in the thorax and trunk, within the respiratory system. Not positioned individually, and containment is not asserted either. Drawn near structures of the same kind, which is a weak claim about location.

What the segmental bronchus connects to

The atlas records 7 typed relationships for it, across 3 kinds of connection. part of lobe of lung and lung.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the segmental bronchus. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as tertiary bronchus. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002184, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

Part of: lobe of lung and lung.
A kind of: bronchus.
contains: bronchus smooth muscle, cartilage of bronchus, lung mesenchyme and epithelium of segmental bronchus.

Questions

Where is the segmental bronchus?

What does the segmental bronchus connect to?

Part of: lobe of lung and lung.

Is the segmental bronchus the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.