Definition for Respiratory system
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Revision as of 20:26, 27 January 2011 by Duddy (Talk | contribs) (Created page with "All components of the body that contribute to the exchange of gas between the external environment and the blood; in mammals, includes the nose, mouth, airways, lungs, and muscle...")
All components of the body that contribute to the exchange of gas between the external environment and the blood; in mammals, includes the nose, mouth, airways, lungs, and muscles and connective tissues that encase these structures within the thoracic (chest) cavity.