Medical Dictionary

lung

noun \ˈləŋ\

Medical Definition of LUNG

1
a :  one of the usually two compound saccular organs that constitute the basic respiratory organ of air-breathing vertebrates, that normally occupy the entire lateral parts of the thorax and consist essentially of an inverted tree of intricately branched bronchioles communicating with thin-walled terminal alveoli swathed in a network of delicate capillaries where the actual gaseous exchange of respiration takes place, and that in humans are somewhat flattened with a broad base resting against the diaphragm and have the right lung divided into three lobes and the left into two lobes b :  any of various respiratory organs of invertebrates
2
:  a mechanical device for regularly introducing fresh air into and withdrawing stale air from the lungs :  respirator—see iron lung
lunged adjective

Illustration of LUNG

July 01, 2015
precarious Hear it
not certain, secure, or steady
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