pulmonary emphysema is a disorder affecting the alveoli (tiny air sacs) of the lungs. the transfer of oxygen and carbon dioxide in the lungs takes place in the walls of the alveoli. in emphysema, the alveoli become abnormally inflated, damaging their walls and making it harder to breathe. people who smoke or have chronic bronchitis have an increased risk of emphysema.
出典:Wiktionary
Multiple origins. Partially from post-Classical Latin emphysema (“swelling”), from Ancient Greek ἐμφυσᾶν (emphusân, “puff up”), from ἐν (en, “in”) + φῦσα (phûsa, “wind”). Also borrowed from Middle French emphysema, from the same Latin source; compare French emphysème. Attested from the late 16th century.[1]
emphysema (countable かつ uncountable, 複数形 emphysemas または emphysemata)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/11 06:43 UTC 版)
Emphysema is a long-term, progressive disease of the lungs that primarily causes shortness of breath. In people with emphysema, the tissues necessary to support the physical shape and function of the lungs 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 sacs, called alveoli, makes these air sacs unable to hold their functional shape upon exhalation. It is often caused by smoking or long-term exposure to air pollution.