Two thousand trillion times diluted blood can smell?! Why the dog’s nose so sensitive?!
Recently a CCTV program “challenge impossible” there was a dog contestant, blood search dog “grassroots” CCTV staged a “Guards” challenge.
This combing “double-horsetail” Springer Spaniel fulfilled the challenge of “special setting” by international criminal investigation expert Dr. Li Changyu, finding out from the 2,000 trillion-fold dilution of the sample the “drop Blood “sample!
As we all know, the nose is the most German Longhaired Pointer dog perceived organ, we humans rely on the environment to observe the environment and access to information is the eyes, and the dog by the nose.
Their sensitive sense of smell is mainly manifested in the degree of sensitivity to the smell and odor recognition. We often describe a dog’s nose as a “dog’s nose” when it’s sensitive, showing how good the dog’s sense of smell is.
Even untrained ordinary dogs, but also more sensitive than the human nose more hidden in the end what is the secret behind it?
Dog nose dual channel system
When we inhale, our sense of smell and breath pass through the same airway. The dog’s nose has a dual-channel system inside. The fold in the nostril separates the two functions.
The air separates into different paths. One (red) path of air flows into the sniffing zone for odor analysis. The other path (blue Color) through the pharynx (black part) to the lungs to complete oxygen exchange and maintain blood oxygen levels.
Up to 300 million olfactory receptors
Dogs have far more olfactory receptors than humans, and humans have an average of about 5 million olfactory receptors, while dogs can have up to 300 million.
- Species Number of olfactory receptors
- Human 500 million
- 125 million dachshund
- Fox 147 million
- Beagle 225 million
- German shepherd 225 million
- Hunting blood dog 300 million
Moreover, the part of the dog’s brain that specializes in the analysis of odors, on a pro-rated basis, is 40 times more powerful than ours.
The second set of olfactory system
In addition to the above two points, the dog has a second set of olfactory system that we humans do not have. This secondary olfactory system consists of an organ called “Jacobson” in English, which can be translated into a “vomitus”.
The Vomer nasal is located at the bottom of the dog’s nasal passages and is designed to detect hormones (sex hormones). Dogs can separate the taste of the opposite sex hormones from the complex odors without being disturbed by other odors.
Because the vomer nasal device has its own neurotransmitter, the system-specific signal that conducts hormones goes to specific parts of the brain. It’s like having your own dedicated computer server. This is also the result of natural evolution, contribute to the dog’s reproductive and DNA extension.
Large ears auxiliary
Some dogs, especially hounds, have a flickering pair of big ears, which are also good helpers for dogs’ sense of smell.
As the dog moves along the ground, the flying ears help to incite the smell into its nose, so the large ears the smell of a dog is better than a dog with a small ear.
Below to give you a list of recognized good sense of smell dog breeds
- Pointer hunting dog
- German hairy pointer hunting dog
- Proud hound
- Springer Spaniel (Grassroots is Springer oh)
- Mariano dog
- Labrador retriever
- German shepherd (black back)
- Basset Hound