Lung

The lung is the essential organ of respiration in air-breathing vertebrates.

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Its principal function is to transport oxygen from the atmosphere into the bloodstream, and excrete carbon dioxide from the bloodstream into the atmosphere. This it accomplishes with its mosaic of specialized cells that form millions of tiny, exceptionally thin-walled air sacs where gas exchange takes place. Lungs also have nonrespiratory functions.

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Medical terms related to the lung often begin with pulmo-, from the Latin pulmonarius ("of the lungs"), cognate with the Greek pleumon ("lung").

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Respiration: Respiration can refer to:...

Oxygen: :This article is about the chemical element oxygen. For other usage, see Oxygen (disambiguation)....

Gas exchange: Gas exchange or respiration takes place at a respiratory surface - a boundary between the external environment and the interior of the body. For unicellular organisms the respiratory surface is simply the cell membrane, but for large organisms it usually is carried out in respiratory systems....

Lung related Images and Photos (experimental)

Kai Lung Unrolls His Mat	Mammal Lung Showing Numerous Alveoli and Several Bronchioles	Mongol Archer on Horseback from Seals of the Emperor Ch'ien Lung and Others 15th-16th Century	Dante Alighieri Italian Writer Meeting His Beloved Beatrice Portinari on the Lung'Arno Florence
Horned Orange and Rose Used with a Vase Bearing the Signature of Chien-Lung to Form an Arrangement	Bronchioles and Numerous Surrounding Alveoli in the Lung	Nurses at Children's Hospital Tending Young Polio Patients Contained in Iron Lung Room