Pet dogs can be seen everywhere in our lives. I would like to ask if you are curious about the body structure of dogs, such as the dog's nose and mouth, and the gap between the nose and mouth. Are you curious about why this gap exists and what it does? Let’s take a look today~

The gap between a dog’s nose and mouth is normal. This is used by dogs to pant, which is helpful for dogs’ breathing. Dogs belong to the phylum Chordata, subphylum Vertebrates, class Mammalia, subclass Eutheria, order Carnivora, order Schizopoda, and canidae. Also known as dog in Chinese, dogs are distributed all over the world. Dogs, horses, cattle, sheep, pigs, and chickens are collectively known as the six domestic animals. Some scientists believe that dogs were domesticated from gray wolves by early humans, and the domestication time ranged from 40,000 to 15,000 years ago. Known as man's most loyal friend, it is the most frequently kept pet, with a lifespan of about 12 to 18 years [1]. In Chinese culture, the dog is one of the twelve animals in the zodiac, ranking 11th among them.

Dogs have the highest sense of smell among all animals. Blind dogs can use their noses to live like normal dogs. The dog's sensitive sense of smell mainly manifests itself in two aspects: one is the sensitivity to smell; the other is the ability to distinguish smells. The sensitivity will vary depending on the type of smell. The ability of dogs to detect odors is 1 million or even 10 million times that of humans. The ability to distinguish odors is more than 1,000 times that of humans. They can distinguish about 20,000 different odors. Specially trained excellent police dogs can distinguish more than 100,000 different odors.

If you didn’t read today’s popular science knowledge, you might never know that this is for breathing, haha~