Emphysema
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Featured: A Scheme for abolishing all Words is one of the wittiest and smartest comments on semantics. (Illustration: extreme close-up from the movie "The Big Swallow" (1901), produced and directed by James Williamson (1855-1933) |
Emphysema is a long-term, progressive disease of the lung that primarily causes shortness of breath. In people with emphysema, the lung tissues necessary to support the physical shape and function of the lung are destroyed. It is included in a group of diseases called chronic obstructive pulmonary disease or COPD (pulmonary refers to the lungs). Emphysema is called an obstructive lung disease because the destruction of lung tissue around smaller airways, called bronchioles, makes these airways unable to hold their functional shape upon exhalation.
The term means swelling and comes from the Greek emhysan meaning inflate, itself composed of en meaning in and physa meaning breath, blast.
