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Respiratory System

OYMPIC RUNNING
The respiratory system is responsible for the exchange of gases between the air and the blood. Breathing occurs when body tissues or cells receive oxygen and rid themselves of carbon dioxide. The respiratory tract consists of the nose, the pharynx, the larynx, the trachea, the bronchi and the lungs. The respiratory cycle consists of inspiration, expiration and gas exchange. MORE! [CG] {NR}

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