define respiration .
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process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.
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respiration is the movement of oxygen from the outside environment to the cells within tissues, and the transport of carbon dioxide in the opposite direction....
ADDITIONALLY ADDED §
• BREATHING or ventilation.
• EXTERNAL RESPIRATION, which is the exchange of gases (oxygen and carbon dioxide) between inhaled air and the blood.
• INTERNAL RESPIRATION, which is the exchange of gases between the blood and tissue fluids.
• CELLULAR RESPIRATION.
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