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Atelectasis (lung Collapse) Renders The Lung Useless For Ventilation.

When the airway is blocked, the blood absorbs the air inside the air sacs (alveoli). Without more air, the sac shrinks. Revisiting atelectasis in lung units with low ventilation/perfusion ratios j appl physiol (1985). Airspaces of the lung resist collapse because of the forces of interdependence, and can, with low or even zero active tidal ventilation, draw in an inspiratory flow of oxygen sufficient to replace the oxygen consumed, thus preventing.