Buttocks

Buttocks
Human buttocks.jpg
Buttocks of a female (upper) and a male (lower).
Details
ArterySuperior gluteal artery, inferior gluteal artery
NerveSuperior gluteal nerve, inferior gluteal nerve, superior cluneal nerves, medial cluneal nerves, inferior cluneal nerves
Identifiers
LatinClunis
D002081
A01.1.00.033
76446
Anatomical terminology

The buttocks (singular: buttock) are two rounded portions of the anatomy, located on the posterior of the pelvic region of primates (including humans), and many other bipeds or quadrupeds, and comprise a layer of fat superimposed on the gluteus maximus and gluteus medius muscles. Physiologically, the buttocks enable weight to be taken off the feet while sitting. In many cultures, they play a role in sexual attraction.[1] Some cultures, such as that of Victorian England, have also used the buttocks as a primary target for corporal punishment,[2] as the buttocks' layer of subcutaneous fat offers protection against injury while still allowing for the infliction of pain. There are several connotations of buttocks in art, fashion, culture and humor, and the English language is replete with many popular synonyms that range from polite colloquialisms ("posterior" or "bottom") to vulgar slang ("arse," "ass," "bum," "butt," "booty," "prat"). In humans the buttocks are located between the lower back and the perineum.

Anatomy

The buttocks are formed by the masses of the gluteal muscles or "glutes" (the gluteus maximus muscle and the gluteus medius muscle) superimposed by a layer of fat. The superior aspect of the buttock ends at the iliac crest, and the lower aspect is outlined by the horizontal gluteal crease. The gluteus maximus has two insertion points: ​13 superior portion of the linea aspera of the femur, and the superior portion of the iliotibial tractus. The masses of the gluteus maximus muscle are separated by an intermediate intergluteal cleft or "crack" in which the anus is situated.

The buttocks allow primates to sit upright without needing to rest their weight on their feet as four-legged animals do. Females of certain species of baboon have red buttocks that blush to attract males. In the case of humans, females tend to have proportionally wider and thicker buttocks due to higher subcutaneous fat and proportionally wider hips. In humans they also have a role in propelling the body in a forward motion and aiding bowel movement.[3][4]

Some baboons and all gibbons, though otherwise fur-covered, have characteristic naked callosities on their buttocks. While human children generally have smooth buttocks, mature males and females have varying degrees of hair growth, as on other parts of their body. Females may have hair growth in the gluteal cleft (including around the anus), sometimes extending laterally onto the lower aspect of the cheeks. Males may have hair growth over some or all of the buttocks.

Other Languages
Alemannisch: Gesäss
العربية: أرداف
aragonés: Cul (anatomía)
Avañe'ẽ: Tumby
Aymar aru: Ch'ina
azərbaycanca: Sağrı
বাংলা: নিতম্ব
Bahasa Banjar: Burit
Bân-lâm-gú: Kha-chhng-táu
беларуская: Ягадзіцы
беларуская (тарашкевіца)‎: Крумянкі
български: Дупе
Boarisch: Oarsch
brezhoneg: Feskenn
català: Cul
Cebuano: Lubot
čeština: Hýždě
chiShona: Magaro
Cymraeg: Ffolen
dansk: Balde
Deitsch: Aasch
Deutsch: Gesäß
eesti: Istmik
emiliàn e rumagnòl: Cûl
español: Nalga
Esperanto: Pugo
euskara: Ipurmasail
فارسی: نشیمنگاه
français: Fesse
Frysk: Stuten
galego: Nádega
贛語: 屁督
客家語/Hak-kâ-ngî: Sṳ́-vut-téu
한국어: 볼기
हिन्दी: नितम्ब
hrvatski: Stražnjica
Ido: Gluteo
Bahasa Indonesia: Bokong
isiXhosa: Iimpundu
íslenska: Rass
italiano: Natiche
עברית: עכוז
Basa Jawa: Bokong
ಕನ್ನಡ: ನಿತಂಬ
Kiswahili: Tako (anatomia)
Kreyòl ayisyen: Bonda
Latina: Nates
latviešu: Sēžamvieta
Lëtzebuergesch: Hënner
lietuvių: Sėdmenys
lumbaart: Cuu
മലയാളം: നിതംബം
मराठी: नितंब
مصرى: ارداف
مازِرونی: موس
Bahasa Melayu: Punggung
Baso Minangkabau: Ikua
Mìng-dĕ̤ng-ngṳ̄: Gū-chiŏng
Nederlands: Bil (anatomie)
नेपाली: पुट्ठा
नेपाल भाषा: बट्टक
日本語:
norsk: Rumpeball
norsk nynorsk: Seteball
Pangasinan: Aping-na-obet
Plattdüütsch: Oors
polski: Pośladek
português: Nádegas
Ripoarisch: Hängischte
română: Fesă
Runa Simi: Siki
русский: Ягодицы
Scots: Buttocks
සිංහල: තට්ටම්
Simple English: Buttocks
Soomaaliga: Futo
српски / srpski: Задњица
suomi: Pakarat
svenska: Stjärt
Tagalog: Puwit
తెలుగు: పిరుదు
Türkçe: Kıç
українська: Сідниці
اردو: سرین
ئۇيغۇرچە / Uyghurche: كاسا
Vahcuengh: Caekhaex
Tiếng Việt: Mông
ייִדיש: תחת
粵語: 囉柚
žemaitėška: Ožpakalis
中文: