Eparterial bronchus

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Eparterial bronchus

Mediastinal surface of right lung. (Eparterial bronchus labeled at center right.)

Front view of cartilages of larynx, trachea, and bronchi. (Eparterial bronchus not labeled, but visible at center left.)
Latin	ramus bronchialis eparterialis
Gray's	subject #240 1097

Also known as the right superior lobar bronchus, the eparterial bronchus is a branch of the right main bronchus given off about 2.5 cm. from the bifurcation of the trachea. This branch supplies the superior lobe of the right lung and is the most superior of all secondary bronchi. It arises above the level of the pulmonary artery, and for this reason is named the eparterial bronchus. All other distributions falling below the pulmonary artery are termed hyparterial. This classification is attributed to Christoph Theodor Aeby (1835–1885) and is central to his model of the anatomical lung which he presented in a monograph titled, "Der Bronchialbaum der Säugethiere und des Menschen, nebst Bemerkungen über den Bronchialbaum der Vögel und Reptilien" (Leipzig : Wilhelm Engelmann, 1880).

The eparterial bronchus is the only secondary bronchus with a specific name apart from the name of its corresponding lobe.

External links

1080754234 at GPnotebook
19:17-0103 at the SUNY Downstate Medical Center - "Pleural Cavities and Lungs: The Bronchi and Their Divisions"
MedEd at Loyola Grossanatomy/dissector/practical/thorax/thorax10.html

This article incorporates text from a public domain edition of Gray's Anatomy.

Anatomy: Lower RT respiratory system (TA A06.3–5, TH H3.05.02, GA 11.1084)

TB tree

Trachea	Tracheal rings Annular ligaments of trachea Carina

Bronchus	main bronchus right left lobar/secondary bronchi eparterial bronchus segmental/tertiary bronchi

Lungs

General	Left lung/Right lung Base/Apex Root/Hilum Superior lobe Lingula of left lung/Middle lobe of right lung Inferior lobe borders: Anterior border Cardiac notch Posterior border Inferior border surfaces: Costal surface Mediastinal surface Cardiac impression Diaphragmatic surface fissures: Oblique fissure Horizontal fissure

BP segment	Bronchiole: Conducting zone (Terminal bronchiole) Respiratory zone (Respiratory bronchiole Alveolar duct Alveolus Blood-air barrier)

Cells	Pneumocyte (Type I pneumocyte Type II pneumocyte) Clara cell Goblet cell

M: RES

anat (n, x, l, c)/phys/devp

noco (c, p)/cong/tumr, sysi/epon, injr

proc, drug (R1/2/3/5/6/7)

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