BRONCHOPULMONARY SEGMENTS

These are well defined sectors of lung each of which is aerated by a tertiary or segmental bronchusIs a pyramidal shaped segment of lung with its apex facing the lung root and its base at the pleural surfaceIt is separated from the adjacent segments by connective tissue septa.

RIGHT LOBEUPPER LOBEApical bronchusPosterior bronchusAnterior bronchusMIDDLE LOBE4. Lateral bronchusMedial bronchusLOWER LOBEApical bronchusMedial basal bronchusAnterior basal bronchusLateral basal bronchusPosterior basal bronchus

LEFT LOBEUPPER LOBEApical bronchusPosterior bronchusAnterior bronchusLINGULA4. Superior bronchusInferior bronchusLOWER LOBEApical bronchusAnterior basal bronchusLateral basal bronchusPosterior basal bronchus

BLOOD SUPPLY

Speciality of broncho-pulmonary segmentBroncho-pulmonary segment is a respiratory unit. Each BP segment haspulmonary arteriole, bronchial artery and bronchioleIs separated from adjacent segments by connective tissue septa which from inter segmental planesIs surrounded by connective tissue which is continuous on the surface with the pleuraIs supplied independently by a segmental ( tertiary bronchus) and a tertiary branch of the pulmonary artery

Speciality of broncho-pulmonary segmentIs drained by the inter-segmental parts of the pulmonary veinsPulmonary vein lies in inter-segmental spaces, so during segmental resection surgeon work along pulmonary veinBroncho-pulmonary segment is not a broncho-vascular segment, because it does not have its own veinEach segment has more than one vein and each vein drains more than one segments