Not only smelling, the human nose also plays many other unexpected roles.
Smell is the most sensitive of the human senses. After a year of not being exposed to a certain scent, humans can still remember 65% correctly while visual can only remember 50% after 3 months.
The sense of smell is the first one possessed by man among all the senses. Even before birth, a baby has developed a full sense of smell and activity from a very early age.
In females, the nose develops until about 15-17 years of age and in males until about 17-19 years of age.
The sense of smell in women is much stronger than in men, especially “fainting” in the first half of the menstrual cycle and peaking during the reproductive period.
In general, the human sense of smell works better in spring and summer, due to the higher humidity in the air.
In addition, we also have a special ability to perceive odors more strongly after exercise due to increased moisture in the nose.
Humans have 5-6 million odor-detecting cells, but rabbits have 100 million and dogs have 220 million.
In general, we will gradually decrease our sense of smell after the age of 65 and only about 50% efficiency by the age of 80.
This is also one of the reasons why most elderly people prefer simple dishes.
Recent research conducted by olfactory researchers at Rockefeller University, New York (USA) shows that the human nose has about 400 types of scent receptors and can distinguish at least 1 trillion different odors according to research.
Previously, scientists had predicted that humans could only perceive 10,000 scents.
One study found that smelling an infant’s scent induces feelings of pleasure in the human brain and stimulates the production of dopamine – a neurotransmitter released when you have sex, eat delicious food or use narcotics.
Perhaps this is also the reason why many people keep looking at a newborn baby and want to… kiss.
Sneezing is a natural reflex that releases air from the lungs through the nose and mouth, usually caused by irritation of the nasal mucosa by small objects outside the body.
Sneezing can go at more than… 150km/h and the amount of saliva sprayed after a sneeze can go as far as 1.5m.
A single sneeze can push about 100,000 germs into the air. In addition, the human nose is also the best air purifier. Human nose hair plays a role in blocking thousands of bacteria and dirt.
Research shows that the sense of smell is closely linked to emotions. 75% of emotions joy, happiness, emotions and memory are stored and activated through the sense of smell.
The sense of smell is the only of the five human senses in direct contact with the hippocampus, the part of the brain responsible for memory.
In particular, one of the sexiest smells from childhood that each of us remembers is the smell of crayons.
Humans secrete pheromones – a chemical secreted only when exposed to the opposite sex in which the human nostrils are not only rich in pheromones, but can also sense the pheromones of the opposite sex.
According to experts, it is this pheromone in the nose that helps people smell the “smells of happiness” of their fellow human beings when two people are together, for example, feeling cuddles or romantic kisses.