Why is the rate of breathing in aquatic anima | vedclass

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(D) $1$. Aquatic animals obtain oxygen from water, where oxygen is dissolved.$2$. The amount of dissolved oxygen in water is significantly lower than

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The amount of dissolved oxygen in water is much lower than the amount of oxygen in the air.

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(D) $1$. Aquatic animals obtain oxygen from water, where oxygen is dissolved.$2$. The amount of dissolved oxygen in water is significantly lower than the amount of oxygen available in the atmosphere.$3$. To obtain sufficient oxygen for their metabolic needs, aquatic animals must process a larger volume of water through their respiratory organs (gills) in a given time.$4$. Consequently, the rate of breathing in aquatic animals is much faster than in terrestrial animals.

Why is the rate of breathing in aquatic animals faster than in terrestrial animals?

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