Have you ever wondered why your hair is on your legs but not on your feet?
Or why do we do it with a lot of hair on my head, but is not it just a single hair in our hands?
It has been a question for many years for PhDs, researchers and other scholars looking at the complex human body machine.
For decades, science was considered Evolution characteristics Some animals, but how the physiological explanation has been created up until now was a question.
The scientists at the Pennsylvania School of Medicine have investigated the "mystery" of these years and have now responded.
Journal research published in the journal Cell Reports, indicates that it is "a fault" no We get hair in specific bodies, a special type of molecule, more signs, for protein.
According to the researchers, that's it Dickkopf 2 (DKK2), called "WNT pathway signaling paths", which are responsible for cellular channels such as hair growth.
"In this study, the WNT produces an inhibitory effect on skin naturally in the skin regions," said the magazine. Newsweek Sarah E. Millar, one of the authors of the research.
"We know that WNT signaling is essential for the development of hair follicles, blocking the hair and causing the formation of more hair," he said.
But why do some animals have hair on most bodies and do not have others?
Research suggests that evolutionary adaptation is known for many years.
The study believes that certain animals produced DKK2 in some parts of their bodies Better to survive their environments.
In this way, for example, it would cost a bit more manually to have some tool or other tasks, because the feet of villi cause the absence of bumps.
In cold climates, however, it would be better to cover them, like white bears.
To achieve these results, the team analyzed the skin of the mouse's legs (like humans, does not hair in their plants) and compares them with other animals, such as rabbits.
Comparing the DKK2 levels between the two species, the amount of protein was significantly lower on the skin of the animals with their hair at the foot of their legs.
In the meantime, the molecule's level was much higher than in areas where the hair does not grow.
The study does not mean that there are not WNT signaling paths, hair generators, but blocking the proteins in these areas.
Researchers are now hoping for new studies on hair growth, treatment of certain diseases or the treatment of future treatments for people suffering severe burns or accidents.