The dog s sense of smell, do you know the dog s sense of smell

It's just getting familiar with the taste.

Or if you have rhinitis, go and check it out.

The olfactory nerve and cranial nerve of the dog are directly connected, and the olfactory nerve is densely distributed in the nasal cavity, and the sensitivity of its sense of smell is very amazing, so police dogs are widely used in the detection of various criminal cases. The results of relevant studies show that there are only 5 million human olfactory cells, covering a small part of the upper nasal mucosa, with an area of only about 5 square centimeters; The dog has about 125000 200000 olfactory cells, and some breeds have more numbers, for example, the olfactory cells of a shepherd dog have 2200000 olfactory cells, and these olfactory cells occupy an area of about 150 square centimeters in the nasal cavity. The olfactory sensitivity of the wolf dog is more than 40 times higher than that of humans, and its nostrils are long and large, which is suitable for analyzing the fine odors in the air, and some varieties with extremely sensitive sense of smell are even more than 1 million times more sensitive than humans.

According to experts, dogs can sense odors of different concentrations from 2 million substances. In general, there are 26.8 billion gas molecules per cubic centimeter of air, and as long as there are 9,000 oleic acid molecules in them, dogs can smell it. A few drops of carbonic acid are dropped in a bucket of water, and the dog can tell the difference.

Some people have also found that dogs are very sensitive to fatty acids in the sweat of human feet, if the sweat secreted by each foot of a person every day is 16 cubic centimeters, of which one thousandth passes through the sole of the shoe, then Zhuang leaves 2 5 1011 fatty acid molecules on each footprint, and the dog is enough to sniff out the traces of people.

Most dogs now have this sense of smell.

Dogs have a more sensitive sense of smell than humans because their body structure is better suited to smelling. In the body of the dog macro stool, this sense of smell remains keen, while in the human body, this sense of smell seems to be relatively dull. Dogs rely on this sense of smell to find food to eat, to spot enemies, to discern companions, children, and to compete with opponents.

The chemical response to smell is called the constitutional response, and the olfactory organs are called chemoreceptors. However, there are few clues about this function in the structure of the dog's nose, and therefore relatively little is known about how odors are sniffed. There are no special structures in the nose that lead to the nerve endings and nerve fibers of the brain, and they are extremely susceptible to damage, so it is not easy to study them.

During balanced breathing, the main airflow passes through the fissure. But when mammals inhale, the gas is sucked into the fissure, passing through about half a square inch of yellowish tissue in which millions of chemoreceptors are embedded. They are long, tiny cells with hairy crowns, which are soaked in mucus on the surface of tissue, forming a web.

They are connected to a part of the brain called the olfactory bulb. The size of the olfactory bulb is a plausible explanation for the sensitivity of the sense of smell.

It is known that dogs have a much larger olfactory bulb than humans. The dog's moist nose also plays a role in its sense of smell.

Dogs are often reluctant to miss any kind of smell, and often consciously sniff the smell, so we understand that the sense of smell is too important for dogs. They keep an eye on the surroundings of their dwelling, smelling the scent of every passerby. For thousands of years, humans have used dogs' keen sense of smell to hunt and track their enemies!

The general distance is 1 2 km.

A dog's sense of smell is about 1,200 times that of a human.

The structure of a dog's nose is much more complex than that of a general animal's nose. Among the higher animals, they use the nose as an organ for breathing air, and also as an olfactory organ for smelling.

There are only 5 million olfactory cells in the human sense, covering a small part of the mucosa in the upper part of the nasal cavity, with an area of only about 5 square centimeters; The olfactory cells of dogs are about 125000 200000, and some breeds have more number, for example, the olfactory cells of a kind of Mushan Song Shepherd Dog have 2200000 olfactory cells, and these olfactory cells occupy an area of about 150 square centimeters in the nasal cavity.

Dogs are a very common canine mammal and the most frequently kept pets.

According to United Nations statistics, the total number of dogs in the world is about 600 million, and there are about 200 million in China. Dogs are the earliest domesticated animals of man. Enlarge.

The results of relevant studies show that there are only 5 million human olfactory cells, covering a small part of the upper nasal mucosa, with an area of only about 5 square centimeters; The dog's nose has many folds, so the surface area in its nose has increased a lot, and the olfactory cells of the Liangcong dog are about 12500 200000, and some breeds have more numbers, for example, the olfactory cells of a shepherd dog have 2200000 olfactory cells, and these olfactory cells occupy an area of about 150 square centimeters in the nasal cavity. With so many olfactory cells, dogs have at least a million times more olfactory ability than we humans.

A dog's sense of smell is about 1,200 times that of a human.

The structure of a dog's nose is much more complex than that of a general animal's nose. In higher animals, in addition to the nose as an organ for breathing air, they also use it as an olfactory organ for smelling.