How To Use External respiration In A Sentence

• In mammals, external respiration - the ventilation of the lungs - is achieved by breathing, the mechanical basis of respiration: the terms are sometimes used synonymously.
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• Sophisticated and accurate methods of analysing respiratory gases were developed in the twentieth century, and the mechanisms of external respiration are now well defined.
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• External respiration is the exchange of oxygen and carbon dioxide in the lungs.
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• The breathing of human beings is one form of respiration, called external respiration.
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