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2015-07-27T20:04:59+05:30

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DOLPHINS: they respire through lungs instead of gills.Unlike humans, dolphins do not breathe reflexively; instead, they have to remember to breathe.

CROCODILE:They don't breathe if they are completely underwater. Their nostrils are on top of their snout and act as a snorkel when they are floating at or just below the surface, but underwater they hold their breath. Because they are reptiles and cold blooded
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