The parts where dogs sweat are generally the tongue and the sweat glands on the soles of the feet. Dogs will also stick out their tongues to dissipate heat when they are very hot.
Dogs, like humans, also have two types of sweat glands: ectocrine sweat glands and apocrine sweat glands. However, canines such as dogs and wolves do not have very developed sweat glands in their bodies. The distribution of their sweat glands is also different from humans. The ectosmotic sweat glands used to regulate body temperature are only scattered on the flesh pads of the four paws, and there are very few. Therefore, the dog looks as if he is not sweating. Humans dissipate heat and regulate body temperature through sweating. Human's external sweat glands are distributed on the skin of the whole body, and play the role of lowering body temperature during hot times or after sweating.
Apocrine sweat glands are located in the armpits and pubic area and have nothing to do with body temperature regulation. The liquid penetrated by apocrine sweat glands itself has no smell, but when mixed with sebum, bacteria will grow and emit a strong smell. Dogs are very different. The apocrine sweat glands that cause their body odor are scattered throughout their bodies. The external sweat glands are only scattered on the flesh pads under the paws.
So, dogs cannot regulate their body temperature through sweating like people do. Because it is difficult for their bodies to lower their body temperature once they heat up, dogs are very afraid of heat. However, just a little sweat from the paws cannot lower the body temperature. As long as they feel a little hot, they will open their mouths, stick out their tongues, and gasp. Doing this can produce a large amount of saliva to replace sweat.
During the summer, owners of dogs should also pay attention to preventing heatstroke in their dogs.
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