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2015-06-24T21:50:38+05:30
The respiratory system  air passages through  pulmonary vessels to the lungs.   lungs  is the respiratory system..
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2015-06-24T22:09:26+05:30
The respiratory system (called also respiratory apparatusventilatory system) is a biological system consisting of specificorgans and structures used for the process of respiration in an organism. The respiratory system is involved in the intake and exchange of oxygen and carbon dioxide between an organism and the environment.
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