Question

Why dogs keeps it's tongue outside in very hot day?

Answer 1

Answer:

Unlike humans, dogs do not have sweat glands, therefore they cannot excrete water to cool down their skin. Instead, dogs rely on the evaporation of their saliva to cool their skin down. They hang their tongues out so the saliva can evaporate and move over their skin and fur.

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Answer 2

Explanation:

during summer dogs get exhausted due to loss of water by prespiration from their body due to which they need more care and they hang out their tongue.