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Encyclopedia results for Mesentery

Mesentery





Encyclopedia results for Mesentery

  1. Mesentery

    Infobox Anatomy Name Mesentery Latin GraySubject 246 GrayPage 1157 Image Gray1038.png Caption Horizontal disposition of the peritoneum in the lower part of the abdomen. The mesentery is marked with red. Image2 Gray1035.png Caption2 Vertical disposition of the peritoneum. Main cavity, red omental bursa, blue. Width 300 System MeshName Mesentery MeshNumber A01.047.025.600.451 File Mesentery.jpg thumb right 550px Mesentery In anatomy , the mesentery is the double layer of peritoneum that suspends the jejunum and ileum from the posterior wall of the abdomen . Its meaning, however, is frequently extended to include double layers of peritoneum connecting various components of the abdominal cavity. Mesentery proper The mesentery proper i.e. the original definition refers to the peritoneum responsible for connecting the jejunum and ileum parts of the small intestine to the back wall of the abdomen. Between the two sheets of peritoneum are blood vessels, lymph vessels, and nerve s. This allows these parts ... of referred pain . The root of proper mesentery extends 15 cm from duodenojejunal flexure at the level ... iliac fossa at the level of right sacroiliac joint . The root of mesentery crosses the second and third ... , and right gonadal artery . Development The mesentery is derived from what is known in the embryo as the dorsal mesentery . The dorsal mesentery is larger than the ventral mesentery , which gradually becomes other parts of the peritoneum. Most parts of the ventral mesentery are associated with the liver. Mesentery general Mesenteries are composed of two layers of peritoneum. The peritoneum that lies ... in contact with itself, forming the organ s mesentery . Mesenteries in the body Mesentery proper surrounds ... peritoneum of the uterus , uterine tube s, and ovaries Pathology A lack of blood supply to the mesentery causes mesenteric ischemia . Invertebrate anatomy In invertebrate s, the term mesentery is used ... or common mesentery. Human embryo of six weeks. gallery Cookery Among cooks, the mesentery is known ...   more details



  1. Dorsal mesentery

    Infobox Embryology Name Dorsal mesentery Latin mesenterium dorsale commune GraySubject 241 GrayPage 1103 Image Gray985.png Caption Abdominal part of digestive tube and its attachment to the primitive or common mesentery. Human embryo of six weeks. Image2 Gray989.png Caption2 Schematic figure of the bursa omentalis, etc. Human embryo of eight weeks. System CarnegieStage Precursor GivesRiseTo MeshName MeshNumber DorlandsPre m 10 DorlandsSuf 12526373 The portion of mesentery attached to the greater curvature of the stomach is named the dorsal mesentery or dorsal mesogastrium , when referring to the portion at the stomach , and the part which suspends the Colon anatomy colon is termed the mesocolon . The dorsal mesogastrium develops into the greater omentum . Image Gray1038 vector.svg left 300px thumb Mesentery in red. Dorsal mesentery is the lower part of the circuit. The upper part is ventral mesentery . Gray s Development of digestive system Peritoneum Category Digestive system digestive stub ...   more details



  1. Ventral mesentery

    Infobox Embryology Name Ventral mesentery Latin GraySubject 241 GrayPage 1103 Image Gray984.png Caption The primitive mesentery of a six weeks human embryo, half schematic. Image2 Gray989.png Caption2 Schematic figure of the bursa omentalis, etc. Human embryo of eight weeks. System CarnegieStage Precursor GivesRiseTo MeshName MeshNumber DorlandsPre m 10 DorlandsSuf 12526439 Ventral mesentery is the part of the peritoneum closest to the navel . Development The cephalic portion of the septum transversum takes part in the formation of the Thoracic diaphragm diaphragm , while the caudal portion into which the liver grows forms the ventral mesentery or ventral mesogastrium , when referring to the portion at the stomach . ref name gray Gray s anatomy ref The lesser omentum is formed, by a thinning of the mesoderm or ventral mesogastrium, which attaches the stomach and duodenum to the anterior abdominal wall . By the subsequent growth of the liver this leaf of mesoderm is divided into two parts, viz., the lesser omentum between the stomach and liver, and the falciform and coronary ligament s between the liver and the abdominal wall and diaphragm. ref name gray Image Gray1038.png left 300px thumb Mesentery in red. Ventral mesentery is the upper part of the circuit. The lower part is dorsal mesentery . References references Development of digestive system Peritoneum Developmental biology stub Category Abdomen ...   more details



  1. Root of the mesentery

    Infobox Anatomy Name Root of the mesentery Latin radix mesenterii GraySubject 256 GrayPage 1157 Image Gray1040.png Caption Diagram devised by Del pine to show the lines along which the peritoneum leaves the wall of the abdomen to invest the viscera. Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName MeshNumber DorlandsPre r 02 DorlandsSuf 12687895 The root of the mesentery or mesenteric root the part connected with the structures in front of the vertebral column is narrow, about 15  cm. long, and is directed obliquely from the duodenojejunal flexure at the left side of the second lumbar vertebra to the right sacroiliac articulation . External links http www.academic server.cvm.umn.edu caseofmonth EqLymphoWeb EqLymphoHistopath.htm Histology at University of Minnesota NormanAnatomy peritoneum NormanAnatomy jejunumileum Gray s Peritoneum Category Vertebral column Musculoskeletal stub ...   more details



  1. Paramesenteric gutters

    Distinguish2 the paracolic gutters , which are recesses between the Colon anatomy colon and the abdominal wall Infobox Anatomy Name Paramesenteric gutters Latin GraySubject GrayPage Image Gray1040.png Caption Diagram devised by Del pine to show the lines along which the peritoneum leaves the wall of the abdomen to invest the viscera. Image2 Caption2 System MeshName MeshNumber DorlandsPre DorlandsSuf The paramesenteric gutters or paramesenteric recesses are two spaces or recesses in the abdominal cavity between the Colon anatomy colon and the root of the mesentery . There are two paramesenteric gutters the left paramesenteric gutter and the right paramesenteric gutter. They are also sometimes incorrectly referred to as other paracolic gutters . Paracolic gutters are recesses between the abdominal wall and the colon. These gutters are clinically important because they allow a passage for infectious fluids from different compartments of the abdomen. The Right Paramesenteric Gutter This space is defined by The ascending colon and caecum laterally further right . The transverse colon Anatomical terms of location Superior and inferior superiorly . The root of the mesentery medially . The Left Paramesenteric Gutter This space communicates with the pelvic cavity and is defined by The root of the mesentery medially . The descending colon laterally further left . See also Peritoneal recesses Paracolic gutters External links SUNYAnatomyLabs 37 14 02 00 Abdominal Cavity Peritoneal Gutters Torso general Category Abdomen Anatomy stub ...   more details



  1. Peritoneum

    . The term mesentery is often used to refer to a double layer of visceral peritoneum. There are often ... serve as an insulating or protective layer. The mesentery is the part of the peritoneum through ... dorsal mesentery greater omentum greater curvature of stomach and spleen transverse colon dorsal mesentery ... mesentery gastrophrenic ligament stomach Thoracic diaphragm diaphragm inferior phrenic arteries left inferior phrenic artery dorsal mesentery gastrocolic ligament stomach transverse colon right gastro omental artery dorsal mesentery splenorenal ligament spleen kidney splenic artery , tail of pancreas ventral mesentery lesser omentum lesser curvature of the stomach and duodenum Liver the right ... and right gastric artery. ventral mesentery hepatogastric ligament stomach liver Gastric arteries right & left gastric artery ventral mesentery hepatoduodenal ligament duodenum liver hepatic artery proper , hepatic portal vein , bile duct mesenteries MESENTERIES dorsal mesentery Mesentery proper small intestine jejunum and ileum posterior abdominal wall superior mesenteric artery dorsal mesentery transverse mesocolon transverse colon posterior abdominal wall middle colic dorsal mesentery sigmoid mesocolon sigmoid colon pelvic wall sigmoid arteries dorsal mesentery mesoappendix mesentery of ileum Vermiform appendix appendix appendicular artery OTHER LIGAMENTS AND FOLDS ventral mesentery falciform ... veins left umbilical vein round ligament of liver liver Navel umbilicus ventral mesentery coronary ... left colic flexure thoracic diaphragm ventral mesentery left triangular ligament , right triangular ... with them from the abdominal wall, and these blood vessels become covered by peritoneum, forming a mesentery ... but lost its mesentery and thus became retroperitoneal. Etymology Peritoneum is derived from Greek ...   more details



  1. Intestinal arteries

    they approach the intestine. In the short, upper part of the mesentery only one set of arches exists, but as the depth of the mesentery increases, second, third, fourth, or even fifth groups are developed ... are given off to the lymph glands and other structures between the layers of the mesentery. References ...   more details



  1. Duodenal cap

    Dablink Disambiguation Duodenal ampulla redirects here. This page is not to be confused with the Ampulla of Vater also known as the hepatopancreatic ampulla the union of the pancreatic duct and the common bile duct. Infobox Anatomy Name Duodenal cap Latin ampulla duodeni bulbus duodeni GraySubject GrayPage Image Caption Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName MeshNumber The duodenal cap or duodenal ampulla is the very first part of the duodenum which is slightly dilated. It is the part which is intraperitoneal and is about 2  cm long. It is mobile and has a mesentery. It is also smooth walled. See also Ampulla Duodenum Digestive tract Category Digestive system anatomy stub digestive stub ...   more details



  1. Marginal artery of the colon

    Infobox Artery Name PAGENAME Latin arteria marginalis coli GraySubject GrayPage Image Inferior mesenteric a.gif Caption Frontal view of the abdominal aorta and the territory supplied by the inferior mesenteric artery . The arteries on the right side left side of image arise from the superior mesenteric artery SMA . The marginal artery not labeled connects the middle colic artery a branch of the SMA to the left colic artery a branch of the IMA . Image2 Colonic blood supply.svg Caption2 Colonic blood supply Marginal artery is 9 BranchFrom superior mesenteric artery , inferior mesenteric artery BranchTo Vein Supplies large intestine MeshName MeshNumber DorlandsPre a 61 DorlandsSuf 12154972 In human anatomy , the marginal artery of the colon , also known as the marginal artery of Drummond and artery of Drummond named after David Drummond academic Sir David Drummond 1852 1932 an England English physician , ref WhoNamedIt synd 3682 ref is a blood vessel that anastomoses connects the inferior mesenteric artery IMA with the superior mesenteric artery SMA . It is sometimes absent, as an anatomical variant. Clinical relevance Along with branches of the internal iliac artery internal iliac arteries , it is usually sufficiently large to supply the oxygenated blood to the large intestine covered by the inferior mesenteric artery and is a reason that in abdominal aortic aneurysm abdominal aortic aneurysm repair the inferior mesenteric artery does not have to be re implanted re attached into the repaired abdominal aorta . The Marginal Artery of Drummond runs in the mesentery close to the bowel as part of the vascular arcade that connects the SMA and IMA. This artery is almost always present and its absence should be considered a variant. The Arc of Riolan, also known as the Meandering Mesenteric artery, is another vascular arcade present in the colonic mesentery that connect the proximal Middle Colic artery with the proximal IMA. This artery is found low in the mesentery, near the ...   more details



  1. Septum transversum

    which divides within it to form the liver and thus gives rise to the ventral mesentery of the foregut ... Gray984.png The primitive mesentery of a six weeks human embryo, half schematic. gallery References ...   more details



  1. Broad ligament of the uterus

    layers this part is known as the mesosalpinx . Function The broad ligament serves as a mesentery ...   more details



  1. Mesoappendix

    Infobox Anatomy Name Mesoappendix Latin GraySubject 249 GrayPage 1178 Image Gray536.png Caption Arteries of cecum and vermiform process . Image2 Caption2 System MeshName MeshNumber DorlandsPre m 11 DorlandsSuf 12526742 The mesoappendix is the portion of the mesentery connecting the ileum to the Vermiform appendix appendix . It may extend to the tip of the appendix. It encloses the appendicular artery and vein, as well as lymphatic vessels, nerves, and often a lymph node. See also Appendectomy External links SUNYAnatomyLabs 37 12 01 03 Abdominal Cavity The Cecum and the Vermiform Appendix eMedicineDictionary Mesoappendix RocheLexicon 03210.000 1 http www.som.tulane.edu classware pathology medical pathology McPath GICD images apdx image4.html Image at tulane.edu Gray s Peritoneum Category Digestive system Anatomy stub ...   more details



  1. Mesorchium

    Infobox Anatomy Name Mesorchium Latin GraySubject 252 GrayPage 1207 Image Mesorchium.svg Caption Schematic drawing of a cross section through the Processus vaginalis vaginal process . 1 testicle , 2 Epididymis , 3 Mesorchium, 4 Lamina visceralis of Tunica vaginalis , 5 Lamina parietalis of Tunica vaginalis, 6 Cavum vaginale , 7 Mesepididymis , 8 Fascia spermatica interna Image2 Caption2 System MeshName MeshNumber DorlandsPre m 11 DorlandsSuf 12527430 The testes , at an early period of fetal life, are placed at the back part of the abdominal cavity , behind the peritoneum, and each is attached by a peritoneal fold, the mesorchium , to the mesonephros . See also mesentery mesovarium Mesorchium is the fibrous sheath which attaches vascular and avascular structures of spermatic cord together. External links SUNYAnatomyLabs 36 08 02 03 Inguinal Region, Scrotum and Testes Coverings of the Testis EmbryologyUNSW Notes urogen4 Gray s Category Developmental biology developmental biology stub ...   more details



  1. Mesometrium

    Infobox Anatomy Name Mesometrium Latin GraySubject GrayPage Image Gray1161.png Caption Uterus and right broad ligament, seen from behind. Broad ligament visible at center. Mesometrium constitutes majority of the broad ligament. Image2 Caption2 System MeshName MeshNumber DorlandsPre m 11 DorlandsSuf 12527229 The mesometrium is the mesentery of the uterus . It constitutes the majority of the broad ligament of the uterus , excluding only the portions adjacent to the uterine tube and ovary . It is adjacent to the mesosalpinx . The ureter is among the structures found in the mesometrium. See also Mesovarium Mesosalpinx External links eMedicineDictionary Mesometrium SUNYAnatomyLabs 43 03 04 05 The Female Pelvis The Broad Ligament DartmouthHumanAnatomy figures chapter 35 35 8.HTM http www.wisc.edu ansci repro lab lab1 lab1images 2002 muscletractlab1.jpg Image at wisc.edu Female reproductive system Peritoneum Category Female reproductive system ligament stub genitourinary stub it Mesometrio ...   more details



  1. Vasa recta (intestines)

    Infobox Artery Name PAGENAME Latin GraySubject 248 GrayPage 1175 Image Gray1065.png Caption Image2 Gray1067.png Caption2 BranchFrom BranchTo Vein Supplies MeshName MeshNumber DorlandsPre DorlandsSuf For the kidney structure, see vasa recta Vasa recta are straight arteries coming off from Arterial arcades arcades in the mesentery of the jejunum and ileum , and heading toward the intestines . The arcades are anastomoses of the jejunal and ileal arteries, branches of superior mesenteric artery . When comparing the vasa recta of the jejunum and the ileum, that of the former are long and few while the vasa recta in the latter are short and many. See also Intestinal arteries No, i believe the vasa recta is the vein equivalent of what is written above Additional images gallery Image Gray535.png Loop of small intestine showing distribution of intestinal arteries. gallery External links NormanAnatomy jejunumileum circulatory stub digestive stub Arteries of abdomen Category Arteries of the abdomen ...   more details



  1. Development of the suspensory ligament of the ovary

    The prenatal development of the suspensory ligament of the ovary is a part of the development of the reproductive system . The suspensory ligament originates from the mesonephros , which, in turn, originates from the Wolffian duct The mesonephros evolves from the Wolffian duct, and this, in turn, by the fifth or sixth week, forms an elongated spindle shaped fold. However, it should not be confused with the urogenital fold . This fold projects into the abdominal cavity at the side of the dorsal mesentery , reaching from the septum transversum in front to the fifth Lumbar vertebrae lumbar segment behind. It gives rise to e.g. the suspensory ligament of the ovary ref http vanat.cvm.umn.edu TFFlectPDFs LectEmbGenitalSys.pdf The University of North Texas Health Science Center Genital System, page 44 ref in women. References Reflist DEFAULTSORT Development Of The Suspensory Ligament Of The Ovary Category Developmental biology Category Female reproductive system Category Ligaments ...   more details



  1. Mesenteric glands

    Wikify date September 2010 Mesenteric glands , or mesenteric lymph nodes , are nodes located in the mesentery . They are of three classes mesenteric lymph nodes, juxta intestinal lymph nodes, and the superior middle group of mesenteric lymph nodes. The Juxta intestinal lymph nodes are located close to the intestinal wall. The mesentric lymph nodes are scattered among the arterial arcades and the superior central nodes are located along the proximal part of the superior mesentric artery. External links http cancerweb.ncl.ac.uk cgi bin omd?mesenteric lymph nodes Online Medical Dictionary mesenteric lymph nodes http cancerweb.ncl.ac.uk cgi bin omd?mesenteric glands Online Medical Dictionary mesenteric glands Category Abdomen med stub ...   more details



  1. Mesenteric lymph nodes

    Infobox Lymph Name PAGENAME Latin nodi lymphoidei mesenterici GraySubject 180 GrayPage 709 Image illu lymph chain09.jpg Caption Lymph Nodes of the Large Intestine and Lower Abdomen Image2 Lymph node regions.svg Caption2 Regional lymph tissue DrainsFrom Source DrainsTo MeshName MeshNumber DorlandsPre n 09 DorlandsSuf 12576745 The mesenteric lymph nodes lie between the layers of the mesentery . They vary from one hundred to one hundred and fifty in number, and may be grouped into three sets, viz. one lying close to the wall of the small intestine, among the terminal twigs of the superior mesenteric artery a second, in relation to the loops and primary branches of the vessels and a third along the trunk of the artery. Additional images gallery Image Gray615.png The lymphatics of cecum and vermiform process from the front. Image Gray616.png The lymphatics of cecum and vermiform process from behind. gallery Gray s lymphatic stub Lymphatics of torso Category Lymphatics of the torso ...   more details



  1. Idiopathic sclerosing mesenteritis

    Idiopathic sclerosing mesenteritis ISM is a disease of the small intestine , characterized by chronic inflammation and eventual fibrosis of the mesentery . ref cite journal last1 Viswanathan first1 Vijay last2 Murray first2 Kevin J year 2010 title Idiopathic sclerosing mesenteritis in paediatrics Report of a successfully treated case and a review of literature journal Pediatric Rheumatology publisher BioMed Central volume 8 issue 5 pages url http www.ped rheum.com content 8 1 5 doi 10.1186 1546 0096 8 5 ref The disease is rare, and as of July 2010, had been diagnosed only 18 times since 1925, and then almost exclusively in adults. ref cite news title Boy gets his wish he s in the Army now first Robert last Kirby newspaper The Salt Lake Tribune date July 30, 2010 url http www.sltrib.com sltrib home 50025983 76 mark army guard soldier.html.csp accessdate ref References reflist disease stub Category Diseases of intestines ...   more details



  1. Appendix

    Wiktionary appendix Appendix may refer to In documents Addendum , any addition to a document, such as a book or legal contract Bibliography , a systematic list of books and other works Index publishing , a list of words or phrases with pointers to where related material can be found in a document Specifically, a text added to the end of a book or an article, containing information that is important to, but is not the main idea of, the main text In anatomy Vermiform appendix , or simply appendix , a part of the human digestive system Left auricular appendix , a conical pouch on the left atrium of the heart Right auricular appendix , a conical pouch on the right atrium of the heart Appendix of the epididymis , a detached efferent duct of the epididymis Appendix testis , a vestigial remnant of the M llerian duct Epiploic appendix , one of several small pouches of fat on the peritoneum along the colon and rectum Appendix of the laryngeal ventricle , a sac that extends from the laryngeal ventricle Mesoappendix , the portion of the mesentery that connects the ileum to the vermiform appendix See also English plural Irregular plurals Irregular English plurals the word appendix disambig de Appendix es Ap ndice fr Appendice io Apendico id Appendiks it Appendice nl Appendix pl Appendiks ru ...   more details



  1. Superior mesenteric plexus

    Infobox Nerve Name PAGENAME Latin plexus mesentericus superior GraySubject 220 GrayPage 987 Image Gray848.png Caption The celiac ganglia with the sympathetic plexuses of the abdominal viscera radiating from the ganglia. Image2 Caption2 Innervates BranchFrom celiac plexus BranchTo MeshName MeshNumber DorlandsPre p 24 DorlandsSuf 12648134 The superior mesenteric plexus is a continuation of the lower part of the celiac plexus , receiving a branch from the junction of the right vagus nerve with the plexus. It surrounds the superior mesenteric artery , accompanies it into the mesentery , and divides into a number of secondary plexuses, which are distributed to all the parts supplied by the artery, viz., pancreatic branches to the pancreas intestinal branches to the small intestine and ileocolic , right colic, and middle colic branches, which supply the corresponding parts of the great intestine. The nerves composing this plexus are white in color and firm in texture in the upper part of the plexus close to the origin of the superior mesenteric artery is the superior mesenteric ganglion . Additional images gallery Image Gray838.png The right sympathetic chain and its connections with the thoracic, abdominal, and pelvic plexuses. Image Gray839.png Diagram of efferent sympathetic nervous system. Image Gray849.png Lower half of right sympathetic cord. gallery External links DartmouthHumanAnatomy figures chapter 32 32 6.HTM Gray s neuroscience stub Autonomic Category Nervous system ...   more details



  1. Ladd's bands

    Ladd s bands , sometimes called bands of Ladd is a fibrous stalk of peritoneum peritoneal Tissue biology tissue that attaches the cecum to the abdominal wall, and creates an obstruction of the duodenum . This condition is found in intestinal malrotation malrotation of the intestine . A surgical operation called a Ladd procedure is performed to alleviate intestinal malrotation. This procedure involves surgical division of Ladd s bands, widening of the small intestine s mesentery , performing an appendectomy and correctional placement of the cecum and Colon anatomy colon . Ladd s bands and the Ladd procedure are named after American pediatrician , William Edwards Ladd 1880 1967 . ref name Browne2007 cite book author Nancy Tkacz Browne title Nursing care of the pediatric surgical patient url http books.google.com books?id CmYrGiHBekEC&pg PA334 accessdate 2 August 2010 year 2007 publisher Jones & Bartlett Learning isbn 9780763740528 pages 334 ref References reflist External links http www.childrenshospital.org az Site1181 printerfriendlypageS1181P0.html Children s Hospital Boston, Intestinal malrotation http www.emedicine.com ped topic1200.htm eMedicine, Intestinal Malrotation anatomy stub Eponymous medical signs for digestive system and general abdominal signs Category Abdomen Ladd s bands ...   more details



  1. Octreotide scan

    Diagnostic infobox Name PAGENAME Image Octreoscan.jpg Caption 111In pentetreotide scintigraphy of the 41 year old man with ectopic Cushing syndrome caused by a neuroendocrine carcinoma of the mesentery. Radiotracer accumulation in the left thyroid in 10 2003 arrow . The mesenterial neuroendocrine tumor became clearly visible in 4 2005 arrow . ICD10 ICD9 ICD9proc 92.18 MeshID OPS301 OPS301 3 70c OtherCodes An octreotide scan or octreoscan is a type of scintigraphy used to find carcinoid and other types of tumors and to localize sarcoidosis. Octreotide , a drug similar to somatostatin , is radiolabeled with indium 111 , ref http www.medicinenet.com carcinoid syndrome page4.htm medicinenet.com Carcinoid Syndrome cont. By Dennis Lee and Jay Marks. Retrieved Mars 2011 ref and is injected into a vein and travels through the bloodstream . The radioactive octreotide attaches to tumor cells that have receptors for somatostatin. A radiation measuring device detects the radioactive octreotide, and makes pictures showing where the tumor cells are in the body. It is also called somatostatin receptor scintigraphy and SRS. References reflist External links http www.cancer.gov Templates db alpha.aspx?CdrID 390304 Octreotide scan entry in the public domain NCI Dictionary of Cancer Terms NCI cancer dict Medical imaging Category 2d nuclear medical imaging oncology stub ...   more details



  1. Descending colon

    Infobox Anatomy Name PAGENAME Latin colon descendens GraySubject 249 GrayPage 1181 Image Gray1223.png Caption Front of abdomen, showing surface markings for liver, stomach, and great intestine. Descending colon visible at center right, in blue. Image2 Gray1056.png Caption2 The duodenum and pancreas . Descending colon visible at lower right. Precursor Hindgut System Artery Left colic artery Vein Nerve Lymph MeshName Colon, Descending MeshNumber A03.556.124.526.356.500 DorlandsPre c 47 DorlandsSuf 12249871 The descending colon of humans passes downward through the left hypochondrium and lumbar regions, along the lateral border of the left kidney . At the lower end of the kidney it turns medialward toward the lateral border of the Psoas major muscle psoas muscle, and then descends, in the angle between psoas and quadratus lumborum , to the crest of the ileum, where it ends in the sigmoid colon . The peritoneum covers its anterior surface and sides, and therefore the descending colon is described as retroperitoneal. The transverse colon and sigmoid colon, which are immediately proximal and distal, are intraperitoneal . Its posterior surface is connected by areolar tissue with the lower and lateral part of the left kidney, the aponeurotic origin of the transversus abdominis , and the quadratus lumborum. It is smaller in caliber and more deeply placed than the ascending colon . It has a mesentery in 33 of people, and is therefore more frequently covered with peritoneum on its posterior surface than the ascending colon which has a mesentery in 25 of people . However, it is less likely to undergo volvulus than the ascending colon. In front of it are some coils of small intestine . Additional images gallery File Descending colon.jpg Descending colon Image illu intestine.jpg Intestines Image Dickdarm Schema.svg Schema Image Gray1038 vector.svg Horizontal disposition of the peritoneum in the lower part of the abdomen. Image Gray1097.png Transverse section through the middle of ...   more details



  1. Paracolic gutters

    Distinguish2 the paramesenteric gutters , which are recesses between the Colon anatomy colon and the root of the mesentery . Infobox Anatomy Name Paracolic gutters Latin sulci paracolici GraySubject GrayPage Image Gray1040.png Caption Diagram devised by Del pine to show the lines along which the peritoneum leaves the wall of the abdomen to invest the viscera. Image2 Caption2 System MeshName MeshNumber DorlandsPre s 28 DorlandsSuf 12769488 The paracolic gutters paracolic sulci , paracolic recesses are spaces between the Colon anatomy colon and the abdominal wall . There are two paracolic gutters The right lateral paracolic gutter. The left lateral paracolic gutter. These gutters are clinically important because they allow a passage for infectious fluids from different compartments of the abdomen. For example fluid from an infected Vermiform appendix appendix can track up the right paracolic gutter to the hepatorenal recess . The right and left paracolic gutters are peritoneal recesses on the posterior abdominal wall lying alongside the ascending and descending colon. The main paracolic gutter lies lateral to the colon on each side. A less obvious medial paracolic gutter may be formed, especially on the right side, if the colon possesses a short mesentery for part of its length. The right lateral paracolic gutter runs from the superolateral aspect of the hepatic flexure of the colon, down the lateral aspect of the ascending colon, and around the caecum. It is continuous with the peritoneum as it descends into the pelvis over the pelvic brim. Superiorly, it is continuous with the peritoneum which lines the hepatorenal pouch and, through the epiploic foramen, the lesser sac. Bile, pus or blood released from viscera anywhere along its length may run along the gutter and collect in sites quite remote from the organ of origin. In supine patients, infected fluid from the right iliac fossa may ascend in the gutter to enter the lesser sac. In patients nursed in a sitting posi ...   more details




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