Why is the rate of breathing fater in aquatic animals than that of the terrestrial animals?
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Aquatic animals take in the oxygen dissolved in water. The amount of dissolved oxygen in water is fairly low compared to the amount of oxygen in the air. Therefore, rate of breathing in aquatic organisms is much faster than in terrestrial organisms.
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The aquatic animals take oxygen dissolved in water. The amount of oxygen dissolved in water is much less than in air. So they have to breathe frequently to take in more and more oxygen to meet their needs
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