The nose is the most sensitive of dogs' perception organs. We humans mainly rely on the eyes to observe environmental things and obtain information, while dogs rely on the nose. Their sensitive sense of smell is mainly reflected in their sensitivity to odor and their ability to distinguish odors. When we often describe a person's nose, it is called "dog nose", which shows how excellent a dog's sense of smell is.
1. Nose structure: There are many wrinkles in the nose, so the surface area in the nose increases a lot, so it has more olfactory cells. Their sense of smell is 1 million times higher than that of humans!
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2. Olfactory mucosal cells
Most mammals' olfactory organs are called olfactory mucosa. The area of dog olfactory mucosa is about 4 times that of humans. There are about 200 million olfactory cells in the olfactory mucosa, which is 30 to 40 times that of our humans. Some people have done experiments and after diluting sulfuric acid one in ten million, dogs can still tell it.
3. Contact odor molecules
The dog's wet nose can contact more odor molecules present in the air.
4. The melanin on the nose
The dog's nasal mucosa is black, and the melanin in the nose can also help the dog improve its sensitivity to smell.