For regrowth of hair and hair loss prevention, see management of hair loss.
The growth of human hair occurs everywhere on the body except for the soles of the feet, the palms of the hands, the inside of the mouth, the lips, the backs of the ears, some external genital areas, the navel, and, apart from eyelashes, the eyelids.[1] Hair is a stratified squamous keratinized epithelium made of multi-layered flat cells whose rope-like filaments provide structure and strength to the hair shaft. The protein called keratin makes up hair and stimulates hair growth. Hair follows a specific growth cycle with three distinct and concurrent phases: anagen, catagen, and telogen. Each phase has specific characteristics that determine the length of the hair.
The body has different types of hair, including vellus hair and androgenic hair, each with its own type of cellular construction. This varied construction gives the hair unique characteristics, serving specific purposes, mainly warmth (redundant in modern humans) and physical protection.[2] Most humans develop the longest thickest hair on their scalps and (mostly observed in males) faces. This hair will usually grow to several feet before terminating, but many humans develop much longer hair.
^Buffoli, Barbara; Rinaldi, Fabio; Labanca, Mauro; Sorbellini, Elisabetta; Trink, Anna; Guanziroli, Elena; Rezzani, Rita; Rodella, Luigi F. (2014). "The human hair: from anatomy to physiology". International Journal of Dermatology. 53 (3): 331–341. doi:10.1111/ijd.12362. PMID 24372228. S2CID 1310059.
^Schneider, Marlon R.; Schmidt-Ullrich, Ruth; Paus, Ralf (2009-02-10). "The hair follicle as a dynamic miniorgan". Current Biology. 19 (3): R132–142. doi:10.1016/j.cub.2008.12.005. ISSN 1879-0445. PMID 19211055.
The growth of humanhair occurs everywhere on the body except for the soles of the feet, the palms of the hands, the inside of the mouth, the lips, the...
Body hair or androgenic hair is terminal hair that develops on the human body during and after puberty. It is different from head hair and also from less...
terminal and fine vellus hair. Most common interest in hair is focused on hairgrowth, hair types, and hair care, but hair is also an important biomaterial...
hair is the hair that grows on the abdomen of humans and non-human mammals, in the region between the pubic area and the thorax (chest). The growth of...
all mammals, humans have the longest growth phase of scalp hair compared to hairgrowth on other parts of the body. For centuries, humans have ascribed...
Ear hair is the terminal hair arising from folliculary cartilage inside the external auditory meatus in humans. In its broader sense, ear hair may also...
Hair removal, also known as epilation or depilation, is the deliberate removal of body hair or head hair. Hair typically grows all over the human body...
of their hair being on a different humanhairgrowth cycle. Almost any area of the body can be waxed, including eyebrows, face, pubic hair (called bikini...
the head. Hair whorls, also known as crowns, swirls, or trichoglyphs, can be either clockwise or counterclockwise in direction of growth. Hair whorls on...
Y, Hu Z (2013). "6-Gingerol inhibits hair shaft growth in cultured humanhair follicles and modulates hairgrowth in mice". PLOS ONE. 8 (2): e57226. Bibcode:2013PLoSO...
Hypertrichosis is an abnormal amount of hairgrowth over the body. The two distinct types of hypertrichosis are generalized hypertrichosis, which occurs...
Vellus hair is short, thin, light-colored, and barely noticeable hair that develops on most of a human's body during childhood. Exceptions include the...
Pubic hair (or pubes /ˈpjuːbiːz/, /pjuːbz/) is terminal body hair that is found in the genital area of adolescent and adult humans. The hair is located...
Nasal hair or nose hair is the hair in the human nose. Adult humans have hair in the nostrils. Nasal hair functions include filtering foreign particles...
These often purport to aid with hairgrowth, dryness, or damage. Ancient Egyptians paid special attention to hair and images of hairdressers are depicted...
Development of the human body is the process of growth to maturity. The process begins with fertilization, where an egg released from the ovary of a female...
Pietilä M, Paus R (27 July 2011). "Spermidine Promotes HumanHairGrowth and Is a Novel Modulator of Human Epithelial Stem Cell Functions". PLOS ONE. 6 (7):...
hair. Typically, the individual's hairgrowth is normal after birth, but shortly thereafter the hair is shed and replaced with sparse, abnormal hair growth...
Leg hair is hair that grows on the legs of humans, generally appearing after the onset of puberty. For aesthetic reasons and for some sports, people shave...
Facial hair is hair grown on the face, usually on the chin, cheeks, and upper lip region. It is typically a secondary sex characteristic of human males...
Syndrome (Primary Growth Hormone Insensitivity): A Unique Model to Explore the Effect of Insulin-Like Growth Factor 1 Deficiency on HumanHair". Dermatology...
Hair care or haircare is an overall term for hygiene and cosmetology involving the hair which grows from the human scalp, and to a lesser extent facial...
Kinky hair, also known as afro-textured hair, is a humanhair texture prevalent in the indigenous populations of many regions with hot climates, mainly...
reached their full chest hair development. The growth continues subsequently. The individual occurrence and characteristics of chest hair depend on the genetic...
Greying of hair, also known as greying, canities, or achromotrichia, is the progressive loss of pigmentation in the hair, eventually turning the hair grey or...
called terminal hair. It forms in specific areas and is hormone-dependent. The term is from the Latin lana, meaning "wool." During human development, the...
the hair shaft of the scalp and does not influence hairgrowth in terms of quantity, textural feel, or appearance on the rest of the body. The hair is...
Hair diseases are illnesses that impact the persistence and regular growth of hair. Types of hair diseases include folliculitis, hirsutism, hypertrichosis...
Fur is a thick growth of hair that covers the skin of almost all mammals. It consists of a combination of oily guard hair on top and thick underfur beneath...
the human body. It consists of head, hair, neck, torso (which includes the thorax and abdomen), arms and hands, legs and feet. The study of the human body...
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