The bronchopulmonary segments are the basic structural and functional units of the lungs. Each lung is divided into lobes, which are further divided into segments. The right lung has three lobes (upper, middle, lower) comprising 10 segments. The left lung has two lobes (upper, lower) comprising 10 segments. Each segment is supplied by its own segmental bronchus and has a pyramidal shape with the apex pointing towards the lung root.

1. BRONCHOPULMONARY
SEGMENTS
DR. MANJARI LOHANI
JR1 ANATOMY
KGMU

2. DEFINITION
The Bronchopulmonary segments are the anatomic
structural and functional unit of lung parenchyma,
each ventilated by a segmental/tertiary bronchus

4. RIGHT LUNG BRONCHOPULMONARY
SEGMENTS
Upper lobe Apical
anterior
posterior
Middle lobe medial
lateral
Lower lobe superior
Medial basal
Anterior basal
Lateral basal
Posterior basal

5. LEFT LUNG BRONCHOPULMONARY
SEGMENTS
Upper lobe apical
anterior
posterior
Superior lingular
Inferior lingular
Lower lobe superior
Medial basal
Anterior basal
Lateral basal
Posterior basal

7. CHARACTERISTICS
• Subdivision of a lung lobe
• Pyramid in shape with apex directed towards
lung root
• Surrounded by connective tissue that is
continuous with visceral pleura
• Each segment can be delineated radiologically

8. APPLIED ASPECTS
• Aspiration in supine position- superior
segment of lower lobe
• Aspiration in standing position- posterior basal
segment of lower lobe of right lung
• Tuberculosis- posterior segment of upper lobe
• Cacinoma- anterior segment of upper lobe
• Segmentectomy- diseased segment can be
removed surgically

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