The human navel is a scar left after the umbilical cord detaches.
Ductus venosus
The navel (clinically known as the umbilicus, colloquially known as the belly button, or tummy button) is a scar on the abdomen at the attachment site of the umbilical cord. All placental mammals have a navel, and it is quite conspicuous in humans.
The umbilicus is used to visually separate the abdomen into quadrants. The navel is the center of the circle enclosing the spread-eagle figure in Leonardo da Vinci's Vitruvian Man drawing. The navel is rarely the focus in contemporary art and literature.
The umbilicus is a prominent mark on the abdomen, with its position being relatively consistent amongst humans. The skin around the waist at the level of the umbilicus is supplied by the tenth thoracic spinal nerve (T10 dermatome). The umbilicus itself typically lies at a vertical level corresponding to the junction between the L3 and L4 vertebrae, with a normal variation among people between the L3 and L5 vertebrae.
Parts of the navel include the "umbilical tip", which is the center of the navel often described as a button shape. The "periumbilical skin" surrounds it. Navels consisting of the umbilical tip protruding past the periumbilical skin have been nicknamed "outies". Outies are often mistaken for umbilical hernias, which is actually a completely different shape with no health concern, unlike an umbilical hernia. The navel (specifically abdominal wall) was considered an umbilical hernia if the protrusion was 5 centimeters or more. The total diameter of an umbilical hernia is usually 10 centimeters.
In addition to change in shape being a possible side effect from ascites and umbilical hernias, the navel can be involved in umbilical sinus or fistula, which in rare cases can lead to menstrual or fecal discharge from the navel. Menstrual discharge from the umbilicus is associated with umbilical endometriosis, a rare disorder.
- Omphalitis, inflammatory condition of umbilicus, usually infected by gram positive bacteria.
To minimize scarring, the navel is a recommended site of incision for various surgeries, including transgastric appendicectomy, gall bladder surgery, and the umbilicoplasty procedure itself.
Society and culture
The public exposure of the male and female midriff and bare navel has been taboo at times in Western cultures, being considered immodest or indecent. It was banned in some jurisdictions, however the community perceptions have changed and exposure of female midriff and navel is more accepted today and in some societies or contexts, it is both fashionable and common, though not without its critics.
While the West was relatively resistant to midriff-baring clothing until the 1980s, it has long been a fashion with Indian women. The Japanese have long had a special regard for the navel. During the early Jomon period in northern Japan, three small balls indicating the breasts and navel were pasted onto flat clay objects to represent the female body. The navel was exaggerated in size, informed by the belief that the navel symbolizes the center of where life begins.
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- Kruszelnicki, Karl. "Bellybutton Facts". ABC Online.
- Hackett, Regina (30 May 2002). "Dunning's examination of torsos is a truly navel experience". Seattle Post-Intelligencer. Retrieved 19 March 2012.[unreliable medical source?]
- Ellis, Harold (2006). Clinical Anatomy: Applied Anatomy for Students and Junior Doctors. New York: Wiley. ISBN 1-4051-3804-1.[page needed]
- O'Rahilly, Ronan; Müller, Fabiola; Carpenter, Stanley; Swenson, Rand (2004). "Abdominal walls". Basic Human Anatomy: A Regional Study of Human Structure. Dartmouth Medical School.
- Herrine, Steven K. "Ascites". Merck.
- Bagade, Pallavi V; Guirguis, Mamdouh M (2009). "Menstruating from the umbilicus as a rare case of primary umbilical endometriosis: a case report". Journal of Medical Case Reports 3: 9326. doi:10.1186/1752-1947-3-9326. PMC 2803849. PMID 20062755.
- D'Alessandro, Donna M. (June 2, 2008). "What’s Wrong With His Belly Button?".[self-published source?][unreliable medical source?]
- Kaehler, G.; Schoenberg, M. B.; Kienle, P.; Post, S.; Magdeburg, R. (2013). "Transgastric appendicectomy". British Journal of Surgery 100 (7): 911–5. doi:10.1002/bjs.9115. PMID 23575528. Lay summary – Medical News Today (April 12, 2013).
- "SRMC Surgeon Offers Gallbladder Removal through Belly Button Incision with da Vinci® System" (Press release). Southeastern Health. December 9, 2013. Retrieved August 16, 2015.
- Bruekers, Sven E.; van der Lei, Berend; Tan, Tik L.; Luijendijk, Roland W.; Stevens, Hieronymus P. J. D. (2009). "'Scarless' Umbilicoplasty". Annals of Plastic Surgery 63 (1): 15–20. doi:10.1097/SAP.0b013e3181877b60. PMID 19546666.
- MedlinePlus Encyclopedia Abdominal thrusts
- "New code may reveal navel". Mohave Daily Miner. 24 March 1985. Retrieved 20 April 2012.
- Banerjee, Mukulika & Miller, Daniel (2003) The Sari. Oxford; New York: Berg ISBN 1-85973-732-3[page needed]
- Naumann, Nelly (2000). "First Indications of Symbolic Expression". Japanese Prehistory: The Material and Spiritual Culture of the Jōmon Period. Otto Harrassowitz Verlag. pp. 114–5. ISBN 978-3-447-04329-8.
- Moreau, Corrie S.; Hulcr, Jiri; Latimer, Andrew M.; Henley, Jessica B.; Rountree, Nina R.; Fierer, Noah; Lucky, Andrea; Lowman, Margaret D.; Dunn, Robert R. (2012). "A Jungle in There: Bacteria in Belly Buttons are Highly Diverse, but Predictable". PLoS ONE 7 (11): e47712. Bibcode:2012PLoSO...747712H. doi:10.1371/journal.pone.0047712. PMC 3492386. PMID 23144827.
- Gabriele, Raimondo; Conte, Marco; Egidi, Federico; Borghese, Mario (2005). "Umbilical metastases: current viewpoint". World Journal of Surgical Oncology 3 (1): 13. doi:10.1186/1477-7819-3-13. PMC 552325. PMID 15723695.
- Piskun, Gregory; Rajpal, Sanjeev (1999). "Transumbilical Laparoscopic Cholecystectomy Utilizes No Incisions Outside the Umbilicus". Journal of Laparoendoscopic & Advanced Surgical Techniques 9 (4): 361–4. doi:10.1089/lap.1999.9.361. PMID 10488834.
- Craig, Stefan B.; Faller, Mary S.; Puckett, Charles L. (2000). "In Search of the Ideal Female Umbilicus". Plastic and Reconstructive Surgery 105 (1): 389–92. doi:10.1097/00006534-200001000-00062. PMID 10627008.
- "New meaning to 'navel-gazing': Scientists study belly button bacteria". Body Odd. NBC News. April 14, 2011.
- "Belly Button Biodiversity Project".