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Leg hair is hair that grows on the legs of humans, generally appearing after the onset of
puberty Puberty is the process of physical changes through which a child Biologically, a child (plural children) is a human Humans (''Homo sapiens'') are the most abundant and widespread species In biology Biology is the natur ...

puberty
. For aesthetic reasons and for some
sports Sport pertains to any form of competitive Competition is a rivalry A rivalry is the state of two people or groups engaging in a lasting competitive relationship. Rivalry is the "against each other" spirit between two competing sides. ...

sports
, people
shave
shave
,
wax Waxes are a diverse class of organic compound In chemistry Chemistry is the study of the properties and behavior of . It is a that covers the that make up matter to the composed of s, s and s: their composition, structure, prope ...
, epilate, or use
hair removal creams A chemical depilatory is a Cosmetics, cosmetic preparation used to Hair removal, remove hair from the skin. Common active ingredients are salts of thioglycolic acid and thiolactic acids. These compounds break the disulfide bonds in keratin and also ...
to remove the hair from their legs: see
leg shaving Leg shaving is the practice of removing leg hair by shaving the hair off using a razor or electric shaver. In addition, some people remove leg hair using waxing, sugaring (epilation), sugaring, depilation, depilatories, epilator, epilators or ...
. The current
Guinness World Record ''Guinness World Records'', known from its inception in 1955 until 1999 as ''The Guinness Book of Records'' and in previous United States editions as ''The Guinness Book of World Records'', is a reference book A reference work is a work, ...
for world's longest leg hair belongs to Jason Allen of Tucson, Arizona at 8.84 inches (22.46 cm).


Growth

The real action of leg hair takes place below the skin or the epidermis. The cells that are in the hair follicles divide and multiply. When the space fills up in the follicle it pushes older cells out and that is what becomes the leg hair. After the older cells become hard and leave the follicle, they form a hair shaft. The hair shaft is mostly made up of dead tissue and a protein that is known as keratin. It is said that hair growth occurs during the "growing" phase of the follicle, and then retained as dead club hair during the "resting" phase. The old club hair might be lost within the following "growing" phase.


Difference between men and women

Men generally have more body hair than women, due to higher levels of androgens. Three different types of hair are present on the human body. Body hair, or androgenic hair, is the terminal hair that develops on the human body during and after puberty. It is differentiated from the head hair and less visible vellus hair, which is much finer and lighter in color. The growth of androgenic hair is related to the level of androgens and the density of androgen receptors in the dermal papillae. Both must reach a threshold for the proliferation of hair follicle cells.


Protein involved in hair growth

Fibroblast growth factor 5 (FGF5) is a secreted signaling protein. The expression of this protein is detected in hair follicles from the mice that scientists have experimented on. The hair follicles are localized to the outer root sheath during one of the phases of the hair growth cycle. Such experiments conclude that the protein FGF5 functions as an inhibitor when pertaining to hair elongation. Seasonal changes are also known to affect hair growth. For instance, one experiment had concluded that the rate of hair growth for men and their beards was lowest in January and February and increased from March to July.


See also

*
Beard A beard is the hair that grows on the jaw, chin, upper lip, lower lip, cheeks, and neck of humans and some non-human animals. In humans, usually only pubescent or adult males are able to grow beards. Some women with hirsutism Hirsutism is e ...

Beard
*
Facial hair Facial hair is hair Hair is a protein filament In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molec ...
*
Arm hair Body hair, or androgenic hair, is the terminal hair that develops on the human body during and after puberty. It is differentiated from the head hair and less visible vellus hair, which is much finer and lighter in color. The growth of androgenic h ...

Arm hair
*
Pubic hair Pubic hair is terminal body hair that is found in the genital area of adolescent and adult humans. The hair is located on and around the sex organs and sometimes at the top of the inside of the thighs. In the pubic region around the pubis ...

Pubic hair
*
Hair Hair is a protein filament In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interactions, Ph ...

Hair
*
Hirsutism Hirsutism is excessive body hair on parts of the body where hair is normally absent or minimal. The word is from early 17th century: from Latin ''hirsutus'' meaning "hairy". It may refer to a "male" pattern of hair growth that may be a sign of a ...
*
Trichophilia Hair fetishism, also known as hair partialism and trichophilia, is a partialism in which a person sees hair most commonly, head hair as particularly Eroticism, erotic and Sexual arousal, sexually arousing. Arousal may occur from seeing or touching ...
* Foot hair


References


Further reading

* * * *Martinez, Carla. “Why Are Men Hairier than Women?” Metode, metode.org/metodes-whys-and-wherefores/why-are-men-hairier-than-women.html. *“Beards, Baldness and Body Hair - Why Men Are Hairy.” Not-For-Profit Health Insurance, www.cbhs.com.au/health-well-being-blog/blog-article/2017/05/31/why-men-are-hairy {{Human hair Lower limb anatomy