
NEET JEE 11 12th Class Science Notes CBSE
June 3, 2025 at 06:14 PM
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● Lungs are situated in the thoracic chamber which is anatomically an air-tight chamber.
● The thoracic chamber is formed dorsally by the vertebral column,ventrally by the sternum, laterally by the ribs and on the lower side by the dome-shaped diaphragm.
● The anatomical setup of lungs in thorax is such that any change in the volume of the thoracic cavity will be reflected in the lung (pulmonary) cavity.
● Such an arrangement is essential for breathing,as we cant directly alter the pulmonary volume
● Lungs are covered by a double layered pleura with pleural fluid between them.It reduces friction on the lung-surface.
● Outer pleural membrane is in close contact with the thoracic lining Inner pleural membrane is in contact with the lung surface.
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