Lingula of left lung

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Lingula of left lung
#1 - Anterior border of lung
#2 - Oblique fissure
#3 - Cardiac notch
#4 - Lingula of left lung
1. Oblique fissure
2. Vertebral part
3. Hilum of lung
4. Cardiac impression
5. Diaphragmatic surface

(Lingula not labeled, but is visible at bottom right.)
Latin lingula pulmonis sinistri
Dorlands/Elsevier l_11/12496679

According to most sources, there is no middle lobe in the left lung as there is in the right lung. However, the term lingula is used to denote a projection of the upper lobe of the left lung that serves as the homologue, and some sources define this as a distinct lobe.

There are two bronchopulmonary segments of the lingula: Superior and inferior.

It is thought that the lingula of the left lobe is the remnant of the right lobe of the lung, which has been lost from the left through evolution

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Anatomy of lungs.

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Anatomy of torso, respiratory system: Lungs and related structures

lungs: right, left, lingula, apex, base, root, cardiac notch, cardiac impression, hilum, borders (anterior, posterior, inferior), surfaces (costal, mediastinal, diaphragmatic), fissures (oblique, horizontal)

conducting zone: trachea, carina, bronchi, main bronchus (right, left), lobar/secondary bronchi (eparterial bronchus), segmental/tertiary bronchi (bronchopulmonary segment), bronchiole, terminal bronchiole

respiratory zone: respiratory bronchiole, alveolar duct, alveolus, alveolar-capillary barrier

pleurae: parietal pleura (cervical, costal, mediastinal, diaphragmatic), pulmonary pleura, pulmonary ligament, recesses (costomediastinal, costodiaphragmatic)

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