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).
History of beliefs about the human body and its disorders and therefore the male body is often explained in place of the female body. A major intervention in the history of the body in the West was Thomas W. Laqueur's 1990 book "Making Sex: Body and Gender from the Greeks to Freud". Laqueur argued that from the eighteenth century into the late twentieth, Western societies had generally thought of humans as having two fundamentally sexes, male and female. But Laqueur argued that from ancient times, the prevailing intellectual understanding of sex was that women were anatomically simply an inferior form of men. For example, Renaldus Columbus, writing