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Noun
1. respiratory organsAnatomy
Wikipedia definition
2. Respiratory systemThe respiratory system is the biological system of an organism that introduces respiratory gases to the interior and performs gas exchange. In humans and other mammals, the anatomical features of the respiratory system include airways, lungs, and the respiratory muscles. Molecules of oxygen and carbon dioxide are passively exchanged, by diffusion, between the gaseous external environment and the blood. This exchange process occurs in the alveolar region of the lungs.
Read “Respiratory system” on English Wikipedia
Read “呼吸器” on Japanese Wikipedia
Read “Respiratory system” on DBpedia

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