Hair

Hair
Gray945.png
Cross section of a hair strand
Hair SEM2.tif
Scanning electron microscopy image of human hair showing keratin scales.
Details
SystemIntegumentary system
Identifiers
Latincapillum
MeSHD006197
TAA16.0.00.014
THH3.12.00.3.02001
FMA70752
Anatomical terminology

Hair is a protein filament that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals.The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair. Most common interest in hair is focused on hair growth, hair types, and hair care, but hair is also an important biomaterial primarily composed of protein, notably alpha-keratin.

Attitudes towards different hair, such as hairstyles and hair removal, vary widely across different cultures and historical periods, but it is often used to indicate a person's personal beliefs or social position, such as their age, sex, or religion.[1]

Overview

The word "hair" usually refers to two distinct structures:

  1. the part beneath the skin, called the hair follicle, or, when pulled from the skin, the bulb. This organ is located in the dermis and maintains stem cells, which not only re-grow the hair after it falls out, but also are recruited to regrow skin after a wound.[2]
  2. the shaft, which is the hard filamentous part that extends above the skin surface. A cross section of the hair shaft may be divided roughly into three zones.

Hair fibers have a structure consisting of several layers, starting from the outside:

  1. the cuticle, which consists of several layers of flat, thin cells laid out overlapping one another as roof shingles,
  2. the cortex, which contains the keratin bundles in cell structures that remain roughly rod-like.
  3. the medulla, a disorganized and open area at the fiber's center.[3]
Other Languages
Afrikaans: Haar
አማርኛ: ፀጉር
العربية: شعر (تشريح)
aragonés: Pelo
ܐܪܡܝܐ: ܡܙܬܐ
armãneashti: Peru
asturianu: Pelo
Avañe'ẽ: Tague
авар: Рас
Aymar aru: Ñik'uta
azərbaycanca: Saç
বাংলা: চুল
Bân-lâm-gú: Mo͘
башҡортса: Сәс
беларуская: Валасы
беларуская (тарашкевіца)‎: Валасы
български: Коса
bosanski: Kosa (glava)
brezhoneg: Blev
català: Pèl
čeština: Chlup (zoologie)
chiShona: Vhudzi
Cymraeg: Blew
dansk: Hår
Deutsch: Haar
Ελληνικά: Τρίχα
español: Pelo
Esperanto: Haro
euskara: Ile
فارسی: مو
français: Poil
Gaeilge: Gruaig
Gàidhlig: Falt
galego: Cabelo
ગુજરાતી: વાળ
गोंयची कोंकणी / Gõychi Konknni: केंस
한국어:
հայերեն: Մազեր
हिन्दी: बाल
hrvatski: Kosa
Ido: Pilo
Bahasa Indonesia: Rambut
ᐃᓄᒃᑎᑐᑦ/inuktitut: ᓄᔭᐃᑦ
Iñupiak: Nuyaq
isiXhosa: Iinwele
íslenska: Hár
italiano: Pelo
עברית: שיער
Basa Jawa: Rambut
ಕನ್ನಡ: ಕೂದಲು
Kapampangan: Buak
ქართული: თმა
қазақша: Шаш
Kiswahili: Nywele
коми: Си
Kreyòl ayisyen: Cheve
Кыргызча: Чач
лакку: ЧӀарарду
Latina: Pilus
latviešu: Mati
lietuvių: Plaukas
മലയാളം: മുടി
मराठी: केस
მარგალური: თუმა
مازِرونی: می
Bahasa Melayu: Rambut
မြန်မာဘာသာ: ဆံပင်
Nāhuatl: Tzontli
Nederlands: Haar (zoogdier)
नेपाली: कपाल
नेपाल भाषा: सँ (म्ह)
日本語: 毛 (動物)
Napulitano: Pire (anatumía)
norsk: Hår
norsk nynorsk: Hår
ଓଡ଼ିଆ: କେଶ
ਪੰਜਾਬੀ: ਵਾਲ
पालि: केसा
Pangasinan: Buek
پنجابی: بال
polski: Włos
português: Cabelo
română: Păr
Runa Simi: Chukcha
русский: Волосы
саха тыла: Баттах
संस्कृतम्: केशः
Scots: Hair
sicilianu: Pilu
Simple English: Hair
سنڌي: وار
slovenčina: Chlp (cicavce)
slovenščina: Las
Soomaaliga: Tin
کوردی: موو
српски / srpski: Коса
srpskohrvatski / српскохрватски: Kosa
Basa Sunda: Buuk
suomi: Karva
svenska: Hår
Tagalog: Buhok
தமிழ்: முடி
తెలుగు: వెంట్రుక
тоҷикӣ: Мӯй
ᏣᎳᎩ: ᎤᏍᏗᏰᎬ
Türkçe: Kıl
тыва дыл: Чаъш
українська: Волосся
اردو: بال
ئۇيغۇرچە / Uyghurche: چاچ
vèneto: Caveji
Tiếng Việt: Lông
Võro: Karv
walon: Poyaedje
Winaray: Buhok
ייִדיש: האר
Yorùbá: Irun
粵語:
Zazaki: Porr
中文: 毛发
Lingua Franca Nova: Capel