Lung Segmental Anatomy

With this basic symmetric anatomy shared between the lungs there are a few differences that can be described. You should be familiar with this anatomy already.

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We will learn the anatomy of the tracheobronchial tree and the segments together.

Lung segmental anatomy. Bilaterally the upper lobes have apical posterior and anterior segments and the lower lobes superior apical and 4 basal segments anterior medial posterior and lateral. Medial and lateral easy to remember m iddle l obe. Thus the right lung has three lobes while the left has two.

Each lobe is supplied by a lobar bronchus. The oblique fissure in the left lung separates the superior and the inferior lobe. Boydens method of numbering the bronchi is extremely effective in correlating the segmental anatomy of the lung with what is seen in the roentgenogram of the chest especially when the bronchi are rendered opaque by contrast media.

Lobes and fissures of the lungs. Each bronchopulmonary segment is served by corresponding branches of the bronchial tree along with their own arterial supply. Each lung is divided into lobes and each lobe is divided into segments.

In general each lung has 10 segments. The upper lobes contains 3 segments the middle lobe lingula 2 and the lower lobes 5. Anatomy of the bronchopulmonary segments.

The middle lobe on the right has 2 segments. The lungs can be further subdivided into bronchopulmonary segments. There are ten such segments located within the right lung and roughly 8 9 on the left side as some of the segments may fuse together.

Each segment is supplied by its own bronchus which is called a segmental bronchus. 1 study figure s1 1. The oblique and horizontal fissure divides the lungs into superior middle and inferior lobes.

The lingula on the left is part of the left upper lobe and is the equivalent.

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