Lungs Dr. Hassan Shaibah
Lungs • lie in the thorax. • Sits on the diaphragm
Apex projected upwards in the neck. • Conical shape base sits on the diaphragm.
Lungs • has 2 surfaces medial or mediastinal(concave) lateral or costal (convex).
posterior (rounded) • has 3borders anterior & inferior (sharp)
Right lung • Shorter. • Wider. • 3 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
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.
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 • 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