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CBSE Class 10 Answered

Sir,Why is the rate of breathing much faster in aquatic organisms than those of terrestrial organisms?
Asked by raoss1967 | 24 Nov, 2015, 07:47: PM
answered-by-expert Expert Answer

Aquatic organisms like fishes breathe in the oxygen dissolved in water through their gills. The amount of dissolved oxygen is fairly low as compared to the amount of oxygen in the air. Therefore, the rate of breathing in aquatic organisms is much faster than that in terrestrial organisms. They try to obtain as much oxygen as possible in minimal amount of time. They also show different adaptations for better gaseous exchange. 

Answered by Sheetal Kolte | 25 Nov, 2015, 10:49: AM

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