The sudden 'secret' of the human nose

Not only smelling, human nose also plays many other unexpected roles.

The most sensitive organ

Smelling is the most sensitive sense of human senses. After a year of not touching a scent, people can still remember exactly 65% ​​while vision can only remember 50% after 3 months.

The earliest development senses

The sense of smell is the first feeling that humans possess among all the senses. Even before birth, the baby has formed a full sense of smell and works very early.

In women, the nose develops to about 15-17 years old and men reach about 17-19 years old.

Women have a stronger sense of smell

The sense of smell in women is much stronger than that of men, especially high "fainting" in the first half of the menstrual cycle and peaks in the reproductive period.

The ability to sense smells changes with the season

In general, the human olfactory works better in spring and summer, due to the higher humidity in the air.

In addition, we also have the ability to especially feel stronger smells after exercising due to increased humidity in the nose.

Less cells smell better than animals

People have 5-6 million cells that detect odors but rabbits have 100 million and dogs have 220 million.

The sense of smell disappears when over 65 years of age

In general, we will gradually reduce our sense of smell after age 65 and only have about 50% efficiency when we reach 80 years old.

This is also one of the reasons why most elderly people prefer simple food.

 

Recent research conducted by olfactory researchers at Rockefeller University in 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.

Scientists had previously predicted that humans could only perceive 10,000 scents.

The smell of an addictive newborn baby

A study showed that the smell of an infant's scent causes pleasure in the human brain and stimulates the production of dopamine - a neurotransmitter that is secreted when you have sex, eat good food or Use addictive drugs.

Perhaps this is also the reason why many people keep looking at their newborn baby . want to kiss.

Speed ​​sneezes faster than a motor

Sneezing is a natural reflex that releases air from the lungs out through the nose and mouth, often caused by irritation of the nasal mucosa of small objects outside the body.

Sneezing can go at a speed of 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 preventing thousands of bacteria and dirt.

The senses are associated with memory

Research shows that the sense of smell is closely linked to emotions. 75% of feelings of joy, happiness, emotions and memory are stored and activated through the sense of smell.

The sense of smell is the only sense in five senses that people are in direct contact with the hippocampus - the part of the brain responsible for memory.

In particular, one of the sexiest smells from childhood that we all remember is the smell of crayons.

Create sublimation emotions

Humans release pheromone - a chemical that only secretes when exposed to the opposite sex in which the nostrils are not only rich in pheromones but also can perceive the pheromone of the opposite sex.

According to experts, it is pheromone in this nose that enables people to smell the "happy smell" of their fellow humans when they are together, such as feeling romantic feelings or kisses.