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狗的皮肤中没有汗腺,它们的汗腺是长在舌头上的。当狗体内的热量增加时,就会伸出舌头急促地呼吸,把热量散发出去,达到降低体温的目的。狗为什么老爱伸着舌头?@小歌
Dogs have no sweat glands in their skin and their sweat glands grow on their tongues. When the dog’s body heat increases, it will stick out his tongue to breathe rapidly, the heat is emitted to achieve the purpose of reducing body temperature. Why do dogs love the old tongue? @ Little song