Atelectasis is composed of 78% nitrogen and 21% oxygen. Since oxygen is exchanged at the alveoli-capillary membrane, nitrogen is a major component for the alveoli's state of inflation. If a large volume of nitrogen in the lungs is replaced with oxygen, the oxygen may subsequently be absorbed into the blood, reducing the volume of the alveoli, resulting in a form of alveolar collapse known as absorption atelectasis. It is usually associated with accumulation of blood, fluid, or air within the pleural cavity, which mechanically collapses the lung. This is a frequent occurrence with pleural effusion, caused by congestive heart failure (CHF).
Invasion of the Body Snatchers (1978 film) Invasion of the Body Snatchers (1978 film) Invasion of the Body Snatchers is a 1978 American science fiction horror film directed by Philip Kaufman, and starring Donald Sutherland, Brooke Adams, Veronica Cartwright, Jeff Goldblum and Leonard Nimoy. Released on December 22, 1978, it is a remake of "Invasion of the Body Snatchers" (1956), which is based on the novel "The Body Snatchers" by Jack Finney. The plot involves a San Francisco health inspector and his colleague who discover that humans are being replaced by alien duplicates; each is a perfect copy of the person replaced, only devoid of human emotion.