Lungs Dr. Hassan Shaibah

Lungs lie in the thorax. Sits on the diaphragm

projected upwards in the neck. Apex projected upwards in the neck. Conical shape base sits on the diaphragm.

concave base

medial or mediastinal (concave) Lungs has 2 surfaces medial or mediastinal (concave) lateral or costal (convex).

has 3 borders posterior (rounded) anterior & inferior (sharp)

Difference between the lungs Right lung Left lung length Shorter. Longer. width Wider. Narrower. lobes 3 (upper, middle and lower). 2 (upper and lower). fissures oblique,horizontal. Oblique. cardiac notch absent. present. Lingula

Right lung Left lung Shorter. Longer Wider. Narrower. 3 lobes 2 lobes (upper, middle and lower). 2 fissures oblique,horizontal. Left lung Longer Narrower. 2 lobes (upper and lower). 1 fissure Oblique.

Difference between the lungs upper upper middle lower lower

Difference between the lungs horizontal. Oblique fissure

Mediastinal surface of the right lung

Mediastinal surface of the left lung

Root (hilum) of the right lung 1- bronchi 2- pulmonary artery (in front of the bronchus) 3- superior pulmonar vein (most anterior) 4- inferior pulmonary vein (most inferior) 1 2 3 4

Root (hilum) of the left lung 1- bronchus (most posterior) 2- pulmonary artery (most superior) 3- superior pulmonar vein (most anterior) 4- inferior pulmonary vein (most inferior) 2 1 4 3

Nerve supply of the lungs By the pulmonary plexus in the root of each lung. The plexus has sympathetic (sympathetic trunk) and parasympathetic (vagus) nerves.

Blood supply of the lungs Arterial supply Venous drainage Bronchi, lung tissue. Bronchial arteries from descending aorta. Bronchial veins to the azygos and hemiazygos veins. Alveoli. Pulmonary arteries Pulmonary veins.

Bronchpulmonary segments Each lobar bronchus gives smaller branches. Each branch with a lung unit form a broncho-pulmonary segment. Each segment has its own nerve, blood and lymph.

Bronchpulmonary segments

Bronchpulmonary segments Inside each segment, the branches divide into smaller bronchioles ending in air sacs where gas exchange occurs. A diseased segment can be removed surgically leaving the remaining lung tissue.

Bronchpulmonary segments Right lung Left lung Upper lobe Apical, anterior, posterior, superior lingular and inferior lingular. Lower lobe Apical, anterior basal, posterior basal, medial basal and lateral basal. Upper lobe Apical, anterior and posterior. Middle lobe Medial and lateral. Lower lobe Apical, anterior basal, posterior basal, medial basal and lateral basal.