Why humans need hair? Do we really need hair? What are hair functions in humans? For decades scientists were trying to identify all hair functions but still not everything is known about human hair functions. At the same time, some hair functions are well known.
Hair functions – protection
It was noted that head hair protects the brain from hypothermia, overheating and mechanical injuries. Moreover, the degree of protection depends on the expected quality and quantity of hair on his head. For example, in warm countries, people distinguished by thick curly hair because air layers between thick curly hairs perform the function of heat insulation.
Eyelashes and eyebrows protect the eyes from dust, wind, rain and sweat drops. There is a myth about long eyelashes – if you cut eyelashes a little bit, the new once will grow long and fluffy. It is not a true. If you cut eyelashes, first, your eyes will remain unprotected and second, your eyelashes will reach the original length.
Hairs in the nose protect the upper respiratory tract from dust and microbes. In addition, the external cold air passing through the nasal passages has time to warm up. According to researchers, based on X-ray tests, nose hairs trap and hold dirt, viruses, bacteria and toxins until we sneeze – it is the confirmation of their protective functions.
Hair functions – protection
Modern human hairs serve several functions: during cold weather they keep and during hot weather they absorb moisture from the skin surface. In addition, hair movements warn us about the presence of foreign object on the skin (eg, insects) – it allows you to timely notice the danger and prevents possible bites. By the way, skin hairs are considered as obstacles for microorganisms for biting.
The hairs in intimate areas are much more visible – they are thicker and darker. Why? There are some explanations:
First, hairs in intimate areas make sex organs better visible and more attractive;
Second, the intimate hairs further reduce friction when moving the arms and legs;
Third, hairs in intimate areas protect local lymph nodes from overheating.
Hair functions – tactility
Almost whole human body surface covered by hair – visible or not visible, fine or thick, colored or not colored. All these hairs have tactile functions. This is why each hair has nerve ending. Every “attack” directed to the skin (hairs) is recognized by nerve system thanks to nerve signals sent from hair endings.
Hair functions – pheromones transmission
Human hairs are pheromone transmitters. Pheromones are types of chemicals that are released by body as a means of “chemical communication” between humans. Pheromones are recognized as a large group of compounds that provide chemical communication between individuals of the same species. It is due to pheromones, the human brain is able to instantly analyze the information and identify the person – pleasant or not, sexy or not, matching expectation or not, suiting or not. There are two types of pheromones: short-range pheromones (recognized only on short distances) and long-range pheromones (recognized on certain distances). First type of pheromones (small volatile substances) is the same in all humans – sending signals about presence of representatives of the opposite sex. Second type of pheromones (heavy bad flying substances) is transmitted during close contact and they are very specific to each individual.
Pheromones are produced by special glands (similar to sweat glands) which are located in the inguinal and axillary areas. It is known that pheromones are also allocated on the hair surface located in these areas.
Interesting facts about hair
Adherents of some religions believe that hair is obtained and store energy and store human memory, so they cannot be cut and painted.
Researchers from the Medical University in Turkey have determined that patients with a small amount of hair in the nose is almost three times more likely to suffer from asthma than those with thick hair growing in the nostrils.
Among the Thai and Korean women is very popular the hair transplant surgery from head to the bikini area. Most of them consider thick pubic hair as a sigh of fertility.
Well known beautiful famous actress Elizabeth Taylor had extraordinary eyes of violet color, framed by thick lashes. Very few people know that the color of the eyes of the actress, as well as the number of lashes is a result of dual genetic mutation. The girl was born with long eyelashes (growing in two rows) – this mutation is extremely rare and is called “distichiasis”.
The reason for the extraordinary violet eyes of Hollywood diva is a rare genetic mutation called “origins of Alexandria.” Children with this type of mutation have normal eye color at birth (blue, brown or gray) and only after 6 months eyes color become close to violet or even purple.
Disclaimer: It is strongly recommended to consult your doctor for professional advice. Above mentioned information and recommendations are just general and should be adapted to each person according to personal health indicators and status.