Bronchi (also known as Bronchus, Primary Bronchi): The larger air passages of the lungs arising from the terminal bifurcation of the TRACHEA. They include the largest two primary bronchi which branch out into secondary bronchi, and tertiary bronchi which extend into BRONCHIOLES and PULMONARY ALVEOLI.

NIH MeSH · D001980Anatomy

Bronchi

Also known asBronchus · Primary Bronchi · Bronchi, Primary · Bronchus, Primary · Primary Bronchus · Secondary Bronchi · Bronchi, Secondary · Bronchus, Secondary · Secondary Bronchus · Tertiary Bronchi · Bronchi, Tertiary · Bronchus, Tertiary

Definition

The larger air passages of the lungs arising from the terminal bifurcation of the TRACHEA. They include the largest two primary bronchi which branch out into secondary bronchi, and tertiary bronchi which extend into BRONCHIOLES and PULMONARY ALVEOLI.

MeSH classification

  • A04.411.125

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Related concepts

Alveolar Epithelial Cells

Epithelial cells that line the PULMONARY ALVEOLI.

Blood-Air Barrier

The barrier between capillary blood and alveolar air comprising the alveolar EPITHELIUM and capillary ENDOTHELIUM with their adherent BASEME…

Common questions about Bronchi

What does Bronchi mean in medicine?
The larger air passages of the lungs arising from the terminal bifurcation of the TRACHEA. They include the largest two primary bronchi which branch out into secondary bronchi, and tertiary bronchi which extend into BRONCHIOLES and PULMONARY ALVEOLI. This definition is taken from the National Library of Medicine's MeSH (Medical Subject Headings) 2026 release, which is the standard vocabulary used to index PubMed and most medical literature.
Is Bronchi known by any other names?
Yes. Bronchi is also referred to as Bronchus, Primary Bronchi, Bronchi, Primary, Bronchus, Primary in different clinical, research and patient-facing contexts. The MeSH descriptor groups all of these synonyms under a single canonical concept so research and records stay consistent.
Where does Bronchi sit in the medical classification?
Bronchi falls under the broader medical category "Anatomy" in the MeSH hierarchy (tree numbers: A04.411.125). Browsing the related concepts on this page takes you to neighbouring topics in the same branch of medicine.
Where can I get a plain-language explanation of Bronchi?
For a plain-language explanation of Bronchi - including symptoms, treatments and what it means for an Indian patient - ask GoDavaii's Health AI. It works in 22+ Indian languages, is free and needs no signup. Tap "Ask GoDavaii AI about Bronchi" above.

Source: NIH MeSH 2026 (D001980) — National Library of Medicine, public domain. View official MeSH record ↗