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Distribution of androgenic hair on human female and male bodies

Androgenic hair, colloquially Body hair, is the terminal hair on the human body developed during and after puberty. It is differentiated from the head hair and less visible vellus hair. Androgenic denotes its growth is related to the level of androgens (male hormones) in the individual. Due to a normally higher level of androgens, men tend to have more androgenic hair than women. Image File history File links This is a lossless scalable vector image. ... Image File history File links Download high resolution version (1500x1947, 304 KB) Summary Distribution of androgenic hair on female and male body, self created, July 21 2006 Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Androgenic hair... Image File history File links Download high resolution version (1500x1947, 304 KB) Summary Distribution of androgenic hair on female and male body, self created, July 21 2006 Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Androgenic hair... Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (2816 × 2112 pixel, file size: 1. ... For the 1968 stage production, see Hair (musical), for the 1979 film, see Hair (film). ... For the 1968 stage production, see Hair (musical), for the 1979 film, see Hair (film). ... One kind of modern beard. ... The term chest hair is generally used to describe hair that grows on the chest of human males, in the region between the neck and the abdomen. ... Underarm hair of a female human Underarm hair of a male human First advert for depilatory powder in a Bazaar Magazine 1915 Underarm hair (Axillary hair) is the composition of hair in the underarm area. ... The term abdominal hair refers to the hair that grows on the abdomen (belly) of humans and non-human mammals, in the region between the pubic area and the thorax (chest). ... Pubic hair is hair in the frontal genital area, the crotch, and sometimes at the top of the inside of the legs; these areas form the pubic region. ... Leg hair of a 17-year old white male Leg hair is hair that grows on the legs of humans, generally appearing at the onset of adulthood. ... Vellus hair is short, fine, peach fuzz body hair. ... Developed hair, which is generally longer, coarser, thicker, and darker than vellus hair. ... Lanugo are hairs that grow on the body to attempt to insulate it because of lack of fat. ... Hair color is the result of pigmentation due to the presence of the chemicals eumelanin and pheomelanin. ... Hypertrichosis is a medical term, also known as Wolfitis, referring to a condition of excessive body hair. ... This article or section does not adequately cite its references or sources. ... Hair removal describes any method of removing hair, especially from the human body. ... Bald redirects here; for other uses see Bald (disambiguation). ... Developed hair, which is generally longer, coarser, thicker, and darker than vellus hair. ... Physical Features of the Human Body The human body is the entire physical structure of a human organism. ... Puberty refers to the process of physical changes by which a childs body becomes an adult body capable of reproduction. ... For the 1968 stage production, see Hair (musical), for the 1979 film, see Hair (film). ... Vellus hair is short, fine, peach fuzz body hair. ... Androgen is the generic term for any natural or synthetic compound, usually a steroid hormone, that stimulates or controls the development and maintenance of masculine characteristics in vertebrates by binding to androgen receptors. ... For other uses, see Hormone (disambiguation). ... Photograph of a nude man by Wilhelm von Gloeden, ca. ... Diverse women. ...

From childhood onward, regardless of sex, vellus hair covers the entire human body. Exceptions include the lips, the backs of the ears, the palms of hands, the soles of the feet, certain external genital areas, the navel and scar tissue. The density of hair (hair follicles per square centimeter) varies from one person to another. Childhood (song) Childhood is a broad term usually applied to the phase of development in humans between infancy and adulthood. ... This article or section does not cite its references or sources. ... Vellus hair is short, fine, peach fuzz body hair. ... The mouth, also known as the buccal cavity or the oral cavity, is the opening through which an animal or human takes in food. ... For other uses, see Ear (disambiguation). ... For other uses, see Hand (disambiguation). ... For other uses, see Foot (disambiguation). ... This article does not cite any references or sources. ... This article does not cite any references or sources. ... For the 1968 stage production, see Hair (musical), for the 1979 film, see Hair (film). ... A hair follicle is part of the skin that grows hair by packing old cells together. ... cm redirects here, alternate uses: cm (disambiguation) A centimetre (symbol cm; American spelling: centimeter) is an SI unit of length. ...

Development and growth

Rising levels of androgens during puberty cause vellus hair to transform into terminal hair over many areas of the body. Hair follicles respond to androgens, primarily testosterone and its derivatives. Different areas respond with different sensitivities. The rate of hair growth and the weight of the hairs increase. The sequence of appearance of androgenic hair reflects the gradations of androgen sensitivity. Since the pubic area is most sensitive, heavier hair usually grows there first. Genetic factors determine individual levels of androgens and thus hair development. Androgen is the generic term for any natural or synthetic compound, usually a steroid hormone, that stimulates or controls the development and maintenance of masculine characteristics in vertebrates. ... Vellus hair is short, fine, peach fuzz body hair. ... Developed hair, which is generally longer, coarser, thicker, and darker than vellus hair. ... A hair follicle is part of the skin that grows hair by packing old cells together. ... Testosterone is a steroid hormone from the androgen group. ...

Development of androgenic hair on a human male

Most noticeable in both sexes are the development of axillary hair and pubic hair. Thus it is sometimes viewed as a secondary sex characteristic. There is a sexual differentiation in the amount and distribution of androgenic hair, with males having more terminal hair in more areas. This includes facial hair, chest hair, abdominal hair, leg and arm hair, and foot hair. Females retain more of the less visible vellus hair, though leg, arm, and foot hair is noticeable. Armpit Hair Underarm hair is the composition of hair in the underarm area. ... Pubic hair is hair in the frontal genital area, the crotch, and sometimes at the top of the inside of the legs; these areas form the pubic region. ... A peacock displays his long, colored feathers, an example of his secondary sexual characteristics. ... This article is about the development of sexual dimorphisms in humans. ... One kind of modern beard. ... The term chest hair is generally used to describe hair that grows on the chest of human males, in the region between the neck and the abdomen. ... The term abdominal hair refers to the hair that grows on the abdomen (belly) of humans and non-human mammals, in the region between the pubic area and the thorax (chest). ... Leg hair of a 17-year old white male Leg hair is hair that grows on the legs of humans, generally appearing at the onset of adulthood. ... Vellus hair is short, fine, peach fuzz body hair. ... Leg hair of a 17-year old white male Leg hair is hair that grows on the legs of humans, generally appearing at the onset of adulthood. ...

Evolution

Evolutionary and genetic evidence suggests human androgenic hair is the remnant of body hair of the type found on today's great apes. Full-on body hair phased out in the course of human evolution roughly 2-3 million years ago. Loss of body hair is related to several unique aspects of human evolution. Homo Erectus, and later pre-modern humans, began relying on sweating for thermoregulation instead of insulating hair. Because of the intensity of sunlight, and harmful ultraviolet radiation, loss of hair put positive selective pressures on development of protective dark skin colour. Based on the numbers and spread of variations in the MC1R nucleotide sequences between humans and chimpanzees, modern hair patterns were seen by 1.2 million years ago. However, hair densities and patterns on humans differ for populations in differing climates. For an explanation of similar terms, see Hominid. ... For the history of humans on Earth, see History of the world. ... Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when temperature surrounding is very different. ... Historical data for native populations collected by R. Biasutti prior to 1940. ... Orthologs Human Mouse Entrez Ensembl na Uniprot na Refseq Location na Pubmed search The melanocortin 1 receptor (also known as melanocyte-stimulating hormone receptor or Mc1r) is one of the key proteins in regulating hair and skin color. ...