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S (PULMONES) -
Present in pleural cavity. Covered by double layered pleura.
Outer parietal pleura and inner visceral pleura.
Both are continuous, slip on each other.
Between them pleural fluid may present in infection so pleurisy is caused.
Lungs are pinkish in colour. Later on turn brown.
Soft, spongy, elastic, made up of involuntary muscles (but does not have own power to contract or relex).
Their contraction or relaxation depends on thoracic cavity or pleural cavity. Lungs are conical in shape.
Each lung has broad concave base on the lower side (due to convex diaphragm).
Lungs are 2 in number. Left lung has 2 lobes left superior & left inferior demarcated by oblique fissure.
Right lung has 3 lobes right superior right middle and right inferior demarcated by transverse and oblique fissure.
Left one smaller than right one, having cardiac notch to adjust heart. Weight of each lung is about 450 gm.
Posted Date: 10/1/2012 8:55:06 AM | Location : United States
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