Answers

2015-09-23T17:11:53+05:30
THEY USE THEIR GILLS TO TAKE OXYGEN FROM THE WATER.WHILE THE
HUMAN BEINGS,BREATHE THROUGH THE LUNGS IN AIR.
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2015-09-24T12:18:58+05:30
Actually whales and dolphins does not breathe through their gills they hold their breathe under water and comes up to take breathe because they are also mammal like us and they also have their lungs.
                                        this is what i know about whales and dolphins.
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