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Encyclopedia > Umbilicus
A navel of a slender man
A navel of a slender man
For the plant genus of this name, see Umbilicus (genus).

The umbilicus (commonly called a navel, or bellybutton) is a scar on the abdomen, caused when the umbilical cord is removed from a newborn baby. All placental mammals have a navel. While it is fairly conspicuous in humans, in most mammals it appears only as a thin hairless line. Image File history File links Download high-resolution version (973x1167, 430 KB) Summary Image of man wearing speedo type swimming costume Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Nudity Swimsuit Umbilicus Talk:Umbilicus Speedo (suit style... Image File history File links Download high-resolution version (973x1167, 430 KB) Summary Image of man wearing speedo type swimming costume Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Nudity Swimsuit Umbilicus Talk:Umbilicus Speedo (suit style... Navel may refer to: The umbilicus, or bellybutton Navel (company), a Japanese software publisher Navel orange, an often seedless strain of oranges See also Naval (disambiguation) Category: ... Species See text. ... A hypertrophic scar on the ilium of the pelvis Both hypertrophic and keloid scars are more common on younger and darker skinned people. ... A newborn at 45 seconds. ... The term baby can refer to: an infant a very early computer—the Small-Scale Experimental Machine, nicknamed Baby a musician – Brian Williams – who performs under the name Baby. ... Orders Superorder Xenarthra: Pilosa Cingulata Infraclass Epitheria: Superorder Afrotheria: Afrosoricida (Golden mole and tenrec) Macroscelidea (Elephant shrew) Tubulidentata (Aardvark) Hyracoidea (Hyrax) Proboscidea (Elephant) Sirenia (Manatee, Dugong) Superorder Laurasiatheria: Chiroptera (Bats) Insectivora (Shrews, Moles) Cetacea (Whale, dolphin) Artiodactyla (Ruminants et al) Perissodactyla(Horse et al. ... Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Australosphenida Ausktribosphenida Monotremata Subclass Eutheria (excludes extinct ancestors) Afrosoricida Anagaloidea (extinct) Arctostylopida (extinct) Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Dinocerata (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia...


In humans, the scar can appear as a depression (sometimes colloquially referred to as an "innie") or as a protrusion ("outie"). Although they can easily be separated into 'innie' and 'outie' categories, navels vary quite drastically in terms of size, shape, depth and overall look, between people. As navels are essentially scars, and not in any way defined by genetics, they are often an easy way to distinguish between identical twins. Fraternal twin boys in the tub The term twin most notably refers to two individuals (or one of two individuals) who have shared the same uterus (womb) and usually, but not necessarily, born on the same day. ...

Contents


Human anatomy

The umbilicus is an important landmark on the abdomen, since its position is relatively consistent among humans. The skin around the waist at the level of the umbilicus is supported by the tenth thoracic spinal nerve (T10 dermatome). The abdomen is a part of the body. ... The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. ... Dermatome has three meanings: in surgery, a surgical instrument used for slicing skin in order to perform skin grafts. ...


About 90% of the people have a depression, or an innie, with the other 10% being outies. The reason for the occurance of an outie versus an innie is a matter of some dispute. Many sources say that the difference is random. Other reasons for the occurance of an outie are extra skin left from the umbilical cord or umbilical hernias, although a child with an umbilical hernia will not necessarily develop an outie.


As well as the visible depression on a person's stomach, the underlying abdominal muscle layers also present a concavity; thinness at this point contributes to a relative structural weakness, making it susceptible to hernia at this point. }} A hernia is a protrusion of a tissue, structure, or part of an organ through the muscular tissue or the membrane by which it is normally contained (definition from MeSH). ...

 Navel at Golden Section - 62% of body height
Navel at Golden Section - 62% of body height

During pregnancy, the uterus presses the navel of the pregnant woman outward. It usually retracts after birth. Image File history File links Download high resolution version (894x1250, 147 KB)Vitruvian Man by Leonardo da Vinci. ... Image File history File links Download high resolution version (894x1250, 147 KB)Vitruvian Man by Leonardo da Vinci. ... Pregnant woman at 26-week gestation A pregnant woman near the end of her term Pregnancy is the carrying of one or more embryos or fetuses by female mammals, including humans, inside their bodies. ... The uterus or womb is the major female reproductive organ of most mammals, including humans. ... Birth is the process in animals by which an offspring is expelled from the body of its mother. ...


The umbilicus is also used to visually separate the abdomen into quadrants. The navel comes in the center of the circle enclosing the spread-eagle figure in Leonardo da Vinci's Vitruvian Man, his famous drawing on human proportions. This illustrates the principle that in the shift between the spread-eagle pose and the straight pose, the apparent center of the figure seems to move, but in reality, the navel of the figure, which is the true center of gravity, remains motionless. Leonardo di ser Piero da Vinci (April 15, 1452 – May 2, 1519) was a talented Italian Renaissance Roman Catholic[1] polymath: architect, anatomist, sculptor, engineer, inventor, geometer, scientist, mathematician, musician, and painter. ... The Vitruvian Man is a famous drawing with accompanying notes by Leonardo da Vinci made around the year 1492 in one of his journals. ... This article or section may contain original research or unverified claims. ...


The height at which navels are located on the abdomen is variable. An ideal proportion of navel height versus body height is said to be based on the Golden Section, also known as the Divine Proportion by philosophers and artists. (This is a geometric proportion in which a line is divided so that the ratio of the length of the longer line segment to the length of the entire line is equal to the ratio of the length of the shorter line segment to the length of the longer line segment.) This Golden Section ratio has a numerical value of .618. In other words, an ideal navel height is about 62% of the body height and, is said to exhibit special beauty as the legs and torso appear in sound proportion. The golden ratio is a number, approximately 1. ...


Fashion

Cropped top with mini-skirt

Fashion sometimes exploits the navel through clothing that leaves part of the lower abdomen (i.e. the midriff) bare, and is much more common for women than for men. Displaying a bare navel has been and still is a taboo in certain Western cultures, since the sheath-like appearance of the navel (especially of an 'innie'), has erotic overtones. For example, in the 1960s, Barbara Eden was not allowed to show her navel on I Dream of Jeannie. Download high resolution version (592x800, 114 KB) Wikipedia does not have an article with this exact name. ... Download high resolution version (592x800, 114 KB) Wikipedia does not have an article with this exact name. ... The term fashion usually applies to a prevailing mode of expression, but quite often applies to a personal mode of expression that may or may not adhere to prevailing ideals. ... Men and women wearing suits, an example of one of the many modern forms of clothing (from the 1937 Chicago Woolen Mills catalog) Clothing is defined, in its broadest sense, as coverings for the torso and limbs as well as coverings for the hands (gloves), feet (socks, shoes, sandals, boots... The abdomen is a part of the body. ... In the human body, the midriff is the section of the body between the chest and the waist. ... For the display of bare skin, as in bare-arse, see Nudity. ... A taboo is a strong social prohibition (or ban) relating to any area of human activity or social custom declared as sacred and forbidden; breaking of the taboo is usually considered objectionable or abhorrent by society. ... The examples and perspective in this article or section may not represent a worldwide view. ... Eroticism is an aesthetic focused on sexual desire, especially the feelings of anticipation of sexual activity. ... The 1960s decade refers to the years from 1960 to 1969, inclusive. ... Barbara Eden, ca. ... I Dream of Jeannie was a popular American sitcom with a fantasy premise. ...


The modern trend of exposing the navel has usually been confined to women (aside from a male belly button shirt fad in the 1980s fashion). While the West has been prudish about midriff-baring dresses till the eighties, Indian women have traditionally worn saris which usually expose the navel as the blouse/choli that is worn with it is intentionally kept short. In Indian culture, exposure of the navel is not considered a taboo and, has in fact, been accepted as a graceful identifying mark of married woman since ages. A dimpled navel is considered a special asset of any prospective bride, especially amongst South Indian girls. Another Indian community that takes navels in stride are the Rajasthanis whose women leave the midriff exposed while wearing short cholis with traditional gypsy skirts. However, these women cover their heads with a 'chador' and even cover their faces in front of strangers, which lends credence to the belief that navel-baring in India has a symbolic, almost mystical association with birth and life and, its display is meant to emphasise the centrality of Nature in the nurture role. Also see halfshirt, bellyshirt, blouse, choli. 1980s fashion in popular culture incorporated distinct trends from different eras, including ancient Egypt, early 20th century English royalty, Victorian era buccaneers, and punk rockers from the 1970s. ... Illustration of a sari-clad woman, c. ... The halfshirt (or Bellyshirt) is a variety of shirt that is abruptly cut off from the bottom of the chest and below, resulting in the complete exposure of the stomach and belly button. ... It has been suggested that this article or section be merged into Crop top. ... A blouse A blouse most commonly refers to a womans shirt, although the term is also used for some mens military uniform shirts. ... A choli is a midriff-baring blouse worn in India, Sri Lanka, Bangladesh, and other countries where the sari is worn. ...


Along with the acceptance of navel display in Western society, navel piercing is becoming common amongst young women. Short shirts to expose navels are also often worn to expose lower back tattoos or stomach/navel tattoos, which are popular among young women. Two female navels, pierced and fitted with barbell jewelry. ...


In recent years a trend has developed among young women, usually beginning in the early teen years, whereby women will expose their navel, much as women in earlier eras accented an exposed ankle.


It is common for belly button lint to collect in the navel as a result of wearing clothes. In Punjabi language the word for navel, 'dhunni', signifies a small lint factory. [citation needed] Navel, with lint Belly button fluff, or more formally navel lint, is an accumulation of fluffy fibres in ones navel. ... (See also List of types of clothing) Introduction Humans often wear articles of clothing (also known as dress, garments or attire) on the body (for the alternative, see nudity). ...


While navels can be the focus of sexual fetishism, especially amongst heterosexual males, it is a fact that navels arouse more than just interest, as never has one gone unnoticed. While cleavage of the breasts is certainly meant to display feminine charms and has a "come-on" appeal, a navel is considered, in equal parts, an innocent emblem of feminity as much as Britney Spears' "not so innocent" button.


Deirdre Day-MacLeod succintly argues about the navel's appeal thus: "Neither procreative nor nutritive, perhaps it is the navel's lack of obvious purpose, combined with its audacious, almost arrogant, spot right there in the middle of things, that sucks its admirers in".[1]


Other meanings

Links to full descriptions of the elements of a Gothic floorplan are also found at the entry Cathedral diagram. ... A driving wheel on a steam locomotive. ... Tortellini in broth Tortellini is a ring-shaped pasta, they are typically stuffed with a mix of meat (pork loin, prosciutto crudo, mortadella) and parmesan cheese although other stuffings are popular in the Po Valley. ... Statue of Venus in the British Museum. ... Roman mythology, the mythological beliefs of the people of Ancient Rome, can be considered as having two parts. ... Detail of the The Birth of Venus (also known as Aphrodite) by William-Adolphe Bouguereau, 1879. ... // Greek mythology consists in part of a large collection of narratives that explain the origins of the world and detail the lives and adventures of a wide variety of gods, goddesses, heroes, and heroines. ...

Mollusks

In mollusks, the umbilicus of a shell is the axially aligned hollow cone within the whorls of a coiled gastropod shell, where no columella has been formed. This is the hole around which the inner surface of the shell is coiled. In species with a wide, open umbilicus, such as the Heath Snail (Helicella itala), the spiral of the whorls can be perceived from the posterior end of the shell. Image File history File links Nautilus_umbilicus. ... Image File history File links Nautilus_umbilicus. ... This page meets Wikipedias criteria for speedy deletion. ... Classes Caudofoveata Aplacophora Polyplacophora Monoplacophora Bivalvia Scaphopoda Gastropoda Cephalopoda † Rostroconchia The mollusks or molluscs are the large and diverse phylum Mollusca, which includes a variety of familiar creatures well-known for their decorative shells or as seafood. ... Various seashells The hard, rigid outer covering of certain animals is called a shell. ... Subclasses Eogastropoda Orthogastropoda The gastropods, gasteropods, or univalves, are the largest and most successful class of mollusks, with 60,000-75,000 extant species known, comprising the snails and slugs as well as a vast number of marine and freshwater species. ...


The umbilicus can vary from very narrow and punctured, as found in Trichia unidentata, to wide and shallow, such as the deep and wide depression in the Rounded Snail (Discus rotundatus). Shells with a conspicuous umbilicus are always orthostylic, i.e. with a poorly developed columella.


Sometimes there is a dimple or funnel-shaped depression, known as the umbilical region or the umbilical field, next to or at the basal hollow of the columella, when the walls of successive whorls are not closely wound against each other.


See also

Look up umbilicus in Wiktionary, the free dictionary.


Wikipedia does not have an article with this exact name. ... Wiktionary is a Wikimedia Foundation project intended to be a free wiki dictionary (hence: Wiktionary) (including thesaurus and lexicon) in every language. ... The Omphalos in Delphi An omphalos is a religious stone artifact in the ancient world. ... Navel lint, or more commonly belly button lint or fluff, is an accumulation of fluffy fibers in ones navel. ... 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). ... Navel fetishism is sometimes, but not always a sexual fetish where an individual is strongly attracted to the human navel (also known as, and is referred to by most navel fetishists as the belly button). ...

  Human anatomical features  v·d·e 

HEAD: Skull - ForeheadEyeEarNoseMouthTongueTeethJawFaceCheekChin Human anatomy or anthropotomy is a special field within anatomy. ... Image File history File links Human body features (external) Created by Vsion. ... For other uses of the word head, see head (disambiguation). ... For symbolic or mythic uses of the human skull, see Skull (symbolism). ... In human anatomy, the forehead or brow is the bony part of the head above the eyes. ... gonfly]].]] In most vertebrates and some mollusks, the eye works by allowing light to enter it and project onto a light-sensitive panel of cells known as the retina at the rear of the eye, where the light is detected and converted into electrical signals, which are then transmitted to... A human ear (also called auricle or pinna) The ear is the sense organ that detects sound. ... Human nose in profile A typical bulbous human nose, here used to support a pair of glasses. ... Sagittal section of nose mouth, pharynx, and larynx. ... Tongue The tongue is the large bundle of muscles on the floor of the mouth that manipulates food for chewing and swallowing. ... This article or section does not cite its references or sources. ... It has been suggested that this article or section be merged with jaw. ... The face of Leonardo da Vincis Mona Lisa, one of the most recognized faces in the world A human face The face is the front part of the head, in humans from forehead to chin including the head, hair, forehead, eyebrow, eyes, nose, cheek, mouth, lips, teeth, skin, and... Look up Cheek in Wiktionary, the free dictionary The Cheeks are the fleshy area of the face below the eyes and between the nose and the left or right ear, the skin being suspended by the chin and the yaws. ... Chin may refer to: In the human anatomy, the chin is the lowermost part of the face. ...


NECK: ThroatAdam's apple The neck is the part of the body on many limbed vertebrates that distinguishes the head from the torso or trunk. ... Anatomy In anatomy, the throat is the part of the neck anterior to the vertebral column. ... An example of male laryngeal prominence. ...


TORSO: ShouldersSpineChestBreastRibcageAbdomenBelly button The human torso Torso is an anatomical term for the greater part of the human body without the head and limbs. ... The human upper arm Grays Fig. ... The vertebral column seen from the side Different regions (curvatures) of the vertebral column The vertebral column (backbone or spine) is a column of vertebrae situated in the dorsal aspect of the abdomen. ... Chest of a human male The chest is a part of the anatomy of humans and various other animals. ... Photograph of a pregnant womans breasts. ... The human rib cage. ... The human abdomen (from the Latin word meaning belly) is the part of the body between the pelvis and the thorax. ...

Sex organs (Penis/Scrotum/Testicle/Clitoris/Vagina/Ovary/Uterus) – HipAnusButtocks

LIMBS: ArmElbowForearmWristHandFinger (Thumb - Index finger - Middle finger - Ring finger - Little finger) – LegLapThighKneeCalf – Heel – AnkleFootToe (Hallux) A sex organ, or primary sexual characteristic, narrowly defined, is any of those anatomical parts of the body (which are not always bodily organs according to the strict definition) which are involved in sexual reproduction and constitute the reproductive system in a complex organism; namely: Male: penis (notably the glans... The penis (plural penises, penes) is an external male sexual organ. ... In some male mammals, the scrotum is an external bag of skin and muscle containing the testicles. ... Human male anatomy The testicles, or testes (singular testis), are the male generative glands in animals. ... A womans clitoris extends from the visible portion to a point below the pubic bone. ... The vagina, (from Latin, literally sheath or scabbard ) is the tubular tract leading from the uterus to the exterior of the body in female placental mammals and marsupials, or to the cloaca in female birds, monotremes, and some reptiles. ... Human female internal reproductive anatomy Ovaries are egg-producing reproductive organs found in female organisms. ... The uterus or womb is the major female reproductive organ of most mammals, including humans. ... Bones of the hip In anatomy, the hip is the bony projection of the femur, known as the greater trochanter, and the overlying muscle and fat. ... Female Human Anatomy Male Human Anatomy Anal redirects here. ... Male human buttocks. ... A limb (from the Old English lim) is a jointed appendage of the human or animal body; a large or main branch of a tree; a representative, branch or member of a group or organization. ... In anatomy, an arm is one of the upper limbs of a two-legged animal. ... Elbow redirects here. ... // The Human Forearm The forearm is the structure on the upper limb, between the elbow and the wrist. ... In human anatomy, the wrist is the flexible and narrower connection between the forearm and the hand. ... A human hand has four fingers and a thumb. ... Fingers of the human left hand The finger is any of the digits of the hand in humans and other species such as the great apes. ... In human anatomy, the thumb is the first digit on a hand. ... The Index finger The index finger, pointer finger or forefinger is the second digit of a human hand, located between the thumb and the middle finger. ... This article is about the vulgar gesture. ... The ring finger on this hand is wearing a ring. ... Little finger The little finger, called the pinky in American English from the Dutch word pink, meaning little finger, is the most ulnar and usually smallest finger of the human hand, opposite the thumb, next to the ring finger. ... Shaved female legs In common usage, a human leg is the lower limb of the body, extending from the hip to the ankle, and including the thigh, the knee, and the cnemis. ... Look up lap in Wiktionary, the free dictionary. ... Diagram of the human thigh bone In humans the thigh is the area between the pelvis and buttocks and the knee. ... For other uses, see Knee (disambiguation). ... A human calf The calf or sura is a pair of muscles—the gastrocnemius and soleus—at the back of the lower human leg. ... The heel is the prominence at the posterior end of the foot. ... Grays Fig. ... A human foot - Enlarge to view legend For other uses, see Foot (disambiguation). ... Toes on foot. ... The hallux or big toe is the biological name for digit I. In humans and non-human primates, the hallux is the largest toe on the foot. ...


SKIN: Hair For alternate meanings see skin (disambiguation). ... Young Girl Fixing her Hair, by Sophie Gengembre Anderson Hair is a filamentous outgrowth from the skin, found mainly in mammals. ...


  Results from FactBites:
 
Definition of umbilicus - Merriam-Webster Online Dictionary (36 words)
Learn more about "umbilicus" and related topics at Britannica.com
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See a map of "umbilicus" in the Visual Thesaurus
Umbilicus definition - Medical Dictionary definitions of popular medical terms (0 words)
Umbilicus definition - Medical Dictionary definitions of popular medical terms
Umbilicus: The vestige left behind on a newborn's belly when the umbilical cord is cut.
Parenting - Find out how parental hyperconcern may be hurting child development and what you can do to help kids cope.
  More results at FactBites »

 
 

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