Anatomy of lungs
RIGHT LUNG : 3 lobes
.HORIZONTAL FISSURE:
Start:4th costal cartilage
Ends :mid-axillary line
.OBLIQUE FISSURE
LEFT LUNG:2 lobes
OBLIQUE FISSURE
SEGMENTS OF LUNGS
right lung:
SUPERIOR LOBE
3
MIDDLE LOBE
2
INFERIOR LOBE
5
LEFT LUNG
SUPERIOR LOBE
5
Upper division: 3
Lower division 2
INFERIOR LOBE
5
superior segment
anteromedial basal segment (merger of "anterior basal" and "medial basal")
posterior basal segment
lateral basal segment
CLINICAL SIGNIFICANCE
The segments are separated from each other by layers of connective tissue that forms them into discrete anatomical and functional units. This separation means that a bronchopulmonary segment can be surgically removed without affecting the function of the others.
Infection remain confined to that area without effecting whole lung except TB and CANCER
ROOT OF LUNGS :
level:T5 ,T6 ,T7
connect medial surface to mediastinum
Anterior to posterior: same in both lungs
Vein
Artery
Bronchus
Above downwards:
Different in both
BRONCHOPULMOARY SEGMENTS
A bronchopulmonary segment is a portion of lung supplied by a specific segmental bronchus and arteries. These arteries branch from the pulmonary and bronchial arteries, and run together through the center of the segment. Veins and lymphatic vessels drain along the edges of the segment. The segments are separated from each other by layers of connective tissue that forms them into discrete anatomical and functional units. This separation means that a bronchopulmonary segment can be surgically removed without affecting the function of the others
BLOOD SUPPLY OF LUNGS
BRONCHIAL ARTERY:
. PULMONARY
ARETERY: deoxygenated blood
VEIN: oxygenated blood
NERVE SUPPLY OF LUNGS
SYMPATHATIC NERVE
2nd - 5th sympathetic ganglion
PARASYMPATHATIC NERVE
VAGUS NERVE