This Is How You Smell (10 Photos)

This Is How You Smell (10 Photos)

12 images...



Humans can distinguish more than 10, 000 different smells. How does it work and how some smell we feel and other not? For example, you all know the difference between smell of coffee and bread, and how do you know it, and how does those two things smell completely different? On the other hand you can not smell the sense of steel, for example. And why?
 

“It is all about the top of your nasal passages behind your nose, there is a patch of special neurons about the size of a postage stamp. These neurons are unique in that they are out in the open where they can come into contact with the air. They have hair-like projections called cilia that increase their surface area. An odor molecule binds to these cilia to trigger the neuron and cause you to perceive a smell.



Smell is a very direct sense. In order for you to smell something, molecules from that thing have to make it to your nose. Everything you smell, therefore, is giving off molecules — whether it is bread in the bakery, onions, perfume, a piece of fruit or whatever.



hose molecules are generally light, volatile (easy to evaporate) chemicals that float through the air into your nose. A piece of steel has no smell because nothing evaporates from it — steel is a non-volatile solid.”

















Via: Discovery Fit and Health