What is smell?

Our nose "knows" to catch smells. They are different, some are pleasant for us, and some are very bad. And how to define what is the smell? Smell is an impulse that is sent by our nose to the brain. There, this information is analyzed and it passes very quickly. The nose is a special organ of perception. A small child does not yet see, but by smell, he can recognize his mother. Our ancestors smelled for food. By smell we catch a danger to ourselves, for example, a fire or a smell of gas.

Perception of odors

When the molecules of matter come into contact withthe nerve endings of our nose, then we perceive the smell. The hairs that cover the mucosa of our nose have the receptors of the nerve cells of the sense of smell. All the air that we draw in by the nose passes through the upper part of the nasopharynx, where these hairs are located. But if we sniff specially, then we draw in air ourselves. If a substance enters the zone of smell, then immediately the brain goes to the brain, and the smell is evaluated there. A person recognizes five types of odors:

  • the one that is associated with colors;
  • burnt;
  • specific;
  • rotten;
  • ethereal.

Sometimes people confuse what smell is and thatsuch a taste. When we eat, the smell of food irritates the smell receptors. For example, if we eat sausage and do not smell, then we will not feel its taste. Therefore, food has no taste when it is cold. Because of the cold, the sense of smell is blocked, and it seems to us that there is no taste for food.

Does not smell

Often happens, we hear from people: "It does not smell." Is there anything that does not smell? Yes there is. For example, natural gas, it has no smell. But to distinguish it from other odors, substances that have an unpleasant, pungent odor are added to it. Also, human sweat, it is also odorless. Only when bacteria appear in it, it begins to smell.

People can not always explain the reason why they like this or that smell. Conducting scientific analyzes does not always give results.

There is such a science - aromatherapy, with the help ofwhich experts have developed a technique for the effect of odors on the human body. Aromatherapists say that the action of essential oils affects the nervous and hormonal reactions. Thus, using natural aromas, we can restore the processes in the body. After all, many know that there are smells that soothe us, and there are smells that give us vigor and efficiency.

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