Why is the dog s nose so smart, why is the dog s nose so smart

The sensitivity of the dog's nose is mainly due to the fact that there are many olfactory cells on the nasal mucosa of dogs, and there are at least hundreds of millions of olfactory cells on the nasal mucosa of a dog, accounting for an area of 150 square centimeters in the nasal cavity, while there are only five million olfactory cells in humans, and the olfactory area of the dog's brain has a stronger ability to process odor molecular signals than humans, so the dog's sense of smell is much more sensitive than that of humans.

Above the dog's upper jaw, there is an independent olfactory system called the vomeronasal organ, which can detect the hormones emitted by various animals, of course, including those emitted from people, this system can help dogs find potential mates, or distinguish friend from foe, dogs can also know our mood through it, and dogs can even know whether a person is pregnant or sick through these smells;

Since the sense of smell is a relatively primitive sense, its conduction does not require thalamic channels, but is directly connected to the structures in the brain that control feelings and intuition, and we can even say that dogs perceive the world more quickly and instinctively than humans.

Dog. 01 In the human nose, olfactory and sensory nerve cells are concentrated in a small area about an inch deep in the nostrils. In dogs, there are at least 6 inches of olfactory nerve cells growing in their noses, and the length means that the sensitivity of the nucleus is increased exponentially.

02 The olfactory membrane of mammals grows on tiny fibrous bones called turbinates, and the more vortices, the larger the surface area of the olfactory membrane. In humans, swirl turbinates and cilia form an olfactory membrane of about 3 square centimeters, but in dogs' large noses, the area of the olfactory membrane is 150 square centimeters due to the many turbinates and folds. Naturally, it has a very sensitive sense of smell.

03 The human brain has a mechanism that inhibits the recognition of smells, so when a person has just arrived in a place, it seems that a certain smell will not be smelled after waiting for a while. But dogs don't have this strong inhibition mechanism, and they consciously track the smell of their prey until it finds it.

04 There is also an explanation that when an odor molecule has a receptor that matches its corresponding receptor, it causes physiological changes in the cell. Obviously, dogs have a dense receptivity point that corresponds to human smells. These points of perception may also be particularly sensitive in identifying people.

Therefore, everyone says that dogs have smart noses.

Dogs have a more sensitive sense of smell than humans because their body structure is better suited to smelling. In dogs, this sense of smell remains keen, while in humans, it seems to be a bit more sluggish. 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. Studying dog noses without special structures leads to nerve endings and nerve fibers to the brain, and they are extremely susceptible to damage.

During balanced breathing, the main airflow passes through the fissure. But when mammals inhale, the gas is drawn into the fissure, through a yellowish tissue structure about half a square inch, 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!

Because dogs have more olfactory cells than humans.

I'm a little puppy with a very smart nose! Of course!