Characteristics of respiratory system
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Explanation:
A respiratory surface is covered with thin, moist epithelial cells that allow oxygen and carbon dioxide to exchange. Those gases can only cross cell membranes when they are dissolved in water or an aqueous solution, thus respiratory surfaces must be moist
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Explanation:
respiratory system is consist of nostrills,nasopharynx ,glottis ,trachea,bronchus,bronchioles,alveoli.Respiration is the combination of inhalation of oxygen and exhalation of carbon dioxide
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