An alveolus (plural: alveoli, from Latin alveolus, `little cavity`) is an anatomical structure that has the form of a hollow cavity. Found in the lung parenchyma, the pulmonary alveoli are the terminal ends of the respiratory tree, which outcrop from either alveolar sacs or alveolar ducts, which are both sites of gas exchange with the blood as w.....
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http://en.wikipedia.org/wiki/Pulmonary_alveolus
any of the small air spaces in the lungs where carbon dioxide leaves the blood and oxygen enters it. Air, entering the lungs during inhalation, ... [7 related articles]
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http://www.britannica.com/eb/a-z/p/132
One of the thin-walled saclike terminal dilations of the respiratory bronchioles, alveolar ducts, and alveolar sacs across which gas exchange occurs between alveolar air and the pulmonary capillaries. ... Synonym: alveoli pulmonis, alveolus, air cells, air vesicles, bronchic cells. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
Type: Term Definitions: 1. a thin-walled saclike terminal dilation of the respiratory bronchioles, alveolar ducts, and alveolar sacs across which gas exchange occurs between alveolar air and the pulmonary capillaries. Synonyms: air cells1, air vesicles, alveoli pulmonis, alveolus1, bronchic cells
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http://www.medilexicon.com/medicaldictionary.php?t=2597
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