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Topic: Jejunum


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In the News (Thu 24 Jul 08)

  
  Jejunum
In anatomy of the digestive system, the jejunum is the central of the three divisions of the small intestine and lies between the duodenum and the ileum.
The pH in the jejunum is usually between 7 and 8 (neutral or slightly alkaline).
The inner surface of the jejunum, its mucous membrane, is covered in projections called villi, which increase the surface area of tissue available to absorb nutrients from the gut contents.
www.mrsci.com /Digestive-System/Jejunum.php   (214 words)

  
 Tropical Medicine Central Resource
The movement of barium through the duodenum and proximal jejunum may be so rapid (with to-and-fro motion and reverse peristalsis which can be dramatic at times) that multiple fluoroscopic spot films and a considerable quantity of barium are often necessary to adequately visualize mucosal detail in the involved areas.
Mucosal folds in the duodenum and jejunum are thickened and spiked and there is segmentation and fragmentation of the barium column due to the combination of irritability, mucosal edema, and increased secretions.
There is marked irritability of the duodenal C loop and proximal jejunum with distortion and thickening of the valvulae conniventes.
tmcr.usuhs.mil /tmcr/chapter9/differential.htm   (747 words)

  
 BioMed Central | Full text | Jejunum free flap in hypopharynx reconstruction: Case series
Jejunum interposition is generally considered the best reconstructive technique when the distal neoplastic margin does not macroscopically extend more than 2 cm below the inferior bord of cricoid [12-15].
The perfusion of the flap was assessed and confirmed by the almost immediate return of peristalsis, by the visceral secretion in the jejunum loop, by the bleeding of the segment and by the restoration of the shiny pink colour of the serosa.
The choice of the jejunum free flap depends both on the general conditions of the patient and on the extent of the cancer.
www.biomedcentral.com /1471-2407/2/13   (3503 words)

  
 Jejunum
The jejunum is the second part with the entire small bowel being over 20 feet long.
The role of the jejunum is to absorb nutrients that come down from above.
You notice that the lining of the jejunum shows tiny pinpoint reflections of light.
www.gicare.com /pated/eidunmjm.htm   (105 words)

  
 the GASTROLAB Image Gallery: Jejunum
Jejunum is a part of the small bowel, located between the distal end of duodenum and the proximal part of ileum.
The diameter of jejunum, especially the proximal part, is larger than that of the distal ileum, and the wall of jejunum is thicker.
Jejunum is not easily accessed by a routine endoscope in a normal patients, but a considerable part of it can be examined in patients who have gone through gastric surgery of the Billroth II type.
www.gastrolab.net /bb12je.htm   (143 words)

  
 Jejunum and Ileum
The jejunum and ileum is slung from the posterior abdominal wall by the mesentery of the small intestines and, therefore, is extremely mobile.
The ileum and jejunum are supplied by the superior mesenteric artery and its intestinal branches.
One way to tell the ileum from the jejunum, other than by general location, is that there are more layers of arcades before the vasa recta are given off, in the ileum.
mywebpages.comcast.net /wnor/jejunumileum.htm   (254 words)

  
 The Small Intestine
Both the duodenum and the jejunum are characterized by modifications of the submucosa.
***The jejunum is characterized by the presence of numerous, large folds in the submucosa, called plicae circulares (aka valves of Kerckring).*** The plicae consist of a core of submucosa and the overlying mucosa.
The plicae in the jejunum tend to be taller and thinner.
courseweb.edteched.uottawa.ca /medicine-histology/English/Gastrointestinal/Gastro_Small_Intest.htm   (2439 words)

  
 Tropical Medicine Central Resource
Note the smooth tube-like appearance of the fourth portion of the duodenum and proximal jejunum with dilatation and mucosal atrophy, in addition to the changes in the second portion of the duodenum resembling the reverse 3 configuration seen with enlargement of the pancreatic head.
The radiological changes in the duodenum and jejunum are due to advanced inflammatory changes, fibrosis and thickening of the intestinal wall as well as involvement of the myenteric plexi.
The changes of fixation, narrowing, rigidity, and poor peristalsis in the duodenum and proximal jejunum are usually, but not inevitably, irreversible at this stage, whereas the mucosal edema and irritability seen in the mid- and distal jejunum may be reversible with proper treatment.
tmcr.usuhs.mil /tmcr/chapter13/radiological3.htm   (1734 words)

  
 SIU SOM Histology GI
The mucosa of the jejunum is typical of the small intestine, with villi and crypts.
In this specimen, a plica with its submucosal core is conspicuous across the center of the image.
Muscularis externa of the jejunum has the standard inner circular and outer longitudinal layers of smooth muscle.
www.siumed.edu /~dking2/erg/GI031b.htm   (184 words)

  
 Abnormal passive chloride absorption in cystic fibrosis jejunum functionally opposes the classic chloride secretory ...   (Site not responding. Last check: 2007-08-18)
jejunum with a triple-lumen tube and constant perfusion of the
The ratio of l-xylose and urea diffusion coefficients is normal in CF jejunum.
of this pathway is not reduced in CF jejunum (29, 30).
www.jci.org /cgi/content/full/112/1/118   (4560 words)

  
 jejunum
Age-related modifications of leucine uptake in brush-border membrane vesicles from rat jejunum.
Aging-related alterations in the contractile responses to acetylcholine, muscarinic cholinoceptors and cholinesterase activities in jejunum and colon of the male Fischer 344 rats.
Effects of aging on the regulation of intracellular pH in the rat jejunum.
www.arclab.org /node_pages/767.html   (663 words)

  
 Genistein stimulates electrogenic Cl- secretion in mouse jejunum -- Baker and Hamilton 287 (6): C1636 -- AJP - Cell ...
of the mouse jejunum in the presence of genistein.
of the mouse jejunum in the presence and absence of a maximum concentration of forskolin (10 µM, mucosal and serosal).
of the mouse jejunum in the presence and absence of genistein (50 µM, mucosal and serosal).
ajpcell.physiology.org /cgi/content/full/287/6/C1636   (5161 words)

  
 Search Results for "Jejunum"
The small intestine is divisible into three portions: the duodenum, the jejunum, and the ileum.
The middle section of the digestive tract in a vertebrate embryo from which the ileum, jejunum, and portions of the duodenum and colon develop.
It extends from the pylorus to the cecum and consists of the duodenum, the jejunum, and the ileum....
bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=Jejunum   (318 words)

  
 eMedicine - Tissue Transfer, Jejunum : Article by Edward W Buchel, MD   (Site not responding. Last check: 2007-08-18)
Careful positioning of the jejunum and the pedicle to avoid kinking or bowing of the jejunum and to avoid increasing vessel redundancy is of prime importance.
Because the jejunum tolerates ischemia poorly, preparation of the neck vessels is vital prior to separating the jejunum from its vascular supply.
The segment of jejunum to be harvested is outlined.
www.emedicine.com /ent/topic744.htm   (2565 words)

  
 Jejunum - Wikipedia, the free encyclopedia
In adult humans, the small intestine is usually between 2-8m (6' 7"-26' 3") long; 1-2 m of which is the jejunum.
The villi in the jejunum are much longer than in the duodenum or ileum.
SUNY Labs 37:11-0100 - "Abdominal Cavity: The Jejunum and the Ileum"
en.wikipedia.org /wiki/Jejunum   (264 words)

  
 Somatostatin sst2 receptors inhibit peristalsis in the rat and mouse jejunum -- Abdu et al. 282 (4): 624 -- AJP - ...
Migrating motor complexes (MMCs) in distended segments of rat jejunum consisted of periodic increases in intraluminal pressure separated by periods of relative quiescence.
-receptor agonists and antagonists on MMC intervals in the rat jejunum.
The pattern of contractile activity observed in the isolated segments of rat and mouse jejunum was similar to the migrating
ajpgi.physiology.org /cgi/content/full/282/4/G624   (5441 words)

  
 Jejunum
The jejunum is characterized by extensive plical folds from which rise tall, slender villi.
The epithelium has the same columnar absorptive epithelium (check for the striated border) and goblet cells as found in the duodenum, but goblet cells are more numerous in the jejunum.
Compare the appearance of the jejunum with the duodenum (slide 115 and 116.
www3.umdnj.edu /histsweb/lab20/lab20jejunum.html   (645 words)

  
 Nikon MicroscopyU: Fluorescence Microscopy Digital Image Gallery - Rat Jejunum Tissue Sections
The jejunum is the central region of the small intestine, connecting the duodenum to the ileum.
Significant mobility within the abdomen is provided to the jejunum because this region of the small intestine and the ileum are suspended by the mesentery.
A rat jejunum tissue section (presented above) was stained with Oregon Green 488 conjugated to wheat germ agglutinin, a plant-derived lectin that targets the Golgi apparatus, as well as Alexa Fluor 568 conjugated to phalloidin for cytoskeletal actin.
www.microscopyu.com /galleries/fluorescence/ratjejunum   (359 words)

  
 Medical Dictionary: Jejunum - WrongDiagnosis.com
Jejunum: The portion of intestine between the duodenum and the ileum (small intestine).
Jejunum: the part of the small intestine between the duodenum and the ileum
Jejunum : portion of the small intestine between the duodenum and the ileum.
www.wrongdiagnosis.com /medical/jejunum.htm   (219 words)

  
 Recombinant Human Interleukin-11 Restores Smooth Muscle Function in the Jejunum and Colon of Human Leukocyte ...
Segments of the jejunum (approximately 5 cm distal to the ligament of Treitz) and the colon (approximately 4 cm distal to
Contractile responses induced by EFS (0.5 ms, 5 Hz) in longitudinal muscles isolated from the jejunum (A) and colon (B) of F344 rats and HLA-B27 transgenic rats with chronic intestinal inflammation.
jejunum, whereas they are impaired in the colon of HLA-B27 rats.
jpet.aspetjournals.org /cgi/content/full/299/1/58   (5467 words)

  
 Chemical nociception in the jejunum induced by capsaicin -- Schmidt et al. 53 (8): 1109 -- Gut
Chemical nociception in the jejunum induced by capsaicin -- Schmidt et al.
Perfusion of the jejunum with capsaicin induced perception that
needed to clarify capsaicin induced sensitisation of the jejunum.
gut.bmjjournals.com /cgi/content/full/53/8/1109   (4978 words)

  
 YourSurgery.ComĀ®-Surgery of the Jejunum and Ileum
The demarcation between the duodenum (1st part of small bowel) and the jejunum (2nd part of small bowel) is the ligament of Treitz (see Surgery of the Duodenum) (Figure 1)
The length of the jejunum is 100 to 110 centimeters in length.
The jejunum, ileum, and associated mesenteries (supporting and suspending structures) are attached to the back wall of the abdomen.
www.yoursurgery.com /ProcedureDetails.cfm?BR=1&Proc=49   (280 words)

  
 Regional Permeability of Salmon Calcitonin in Isolated Rat Gastrointestinal Tracts: Transport Mechanism Using Caco-2 ...
The objective of the study was to determine the region of maximum permeation of salmon calcitonin (sCT) through the gastrointestinal tract and to investigate the mechanism of permeation.
Stomach, duodenum, jejunum, ileum, or colon tissues were mounted on Navicyte side-by-side diffusion apparatus.
Based on the absorptive surface area in jejunum and ileum, sCT was expected to permeate through the jejunum more than the ileum.
www.aapspharmsci.org /view.asp?art=aapsj060431   (3094 words)

  
 Normal Histology of Jejunum   (Site not responding. Last check: 2007-08-18)
The image of jejunum shows mucosa and submucosa.
The surface is lined by mucus producing goblet cells.
The villous pattern is pronounced, and there are many crypts of Lieberkuhn.
www.usuhs.mil /pat/surg_path/nlhist/jejunum.html   (29 words)

  
 Nikon MicroscopyU: Fluorescence Microscopy Digital Image Gallery - Rat Jejunum Myenteric Plexus Enteroglial Cells ...
The line was established from a myenteric plexus sample from the jejunum of an adult male laboratory rat (Rattus rattus; Sprague-Dawley strain).
Localizing the Golgi Complex in EGC Cell Cultures with Wheat Germ Agglutinin - A culture of rat jejunum enteroglial cells was labeled with wheat germ agglutinin (WGA) conjugated to Oregon Green 488.
F-Actin and Mitochondria Distribution in Rat Jejunum Enteroglial Cells - MitoTracker Red CMXRos and Alexa Fluor 488 conjugated to phalloidin were utilized to label the featured culture of EGC cells, targeting the mitochondrial network and filamentous actin, respectively.
www.microscopyu.com /galleries/fluorescence/cells/egc/egc.html   (586 words)

  
 Blue Histology - Gastrointestinal Tract
The gastrointestinal tract (GIT) comprises the stomach, duodenum, jejunum, ileum, colon, rectum and anal canal.
Draw part of the stomach wall, and identify in your drawing the mucus-producing cells of the secretory sheath, the light, undifferentiated looking mucous neck cells, the slightly pink, fairly large parietal cells and the somewhat darker bluish-violet chief cells.
The small intestine is divided into duodenum (25-30 cm), jejunum (about first two-fifths of the rest) and ileum.
www.lab.anhb.uwa.edu.au /mb140/CorePages/GIT/git.htm   (2846 words)

  
 Short Bowel Syndrome - Children's Hospital Boston
The jejunum makes up about 2/5 of the rest of the small intestine, but is the largest section because its many folds give it an increased surface area for absorption.
The entire jejunum can be usually be removed without problems resulting.
Removal of the ileum accounts for most of the problems seen in short bowel syndrome because it is responsible for the absorption of fats, bile salts, and B12.
www.childrenshospital.org /az/Site1581/printerfriendlypageS1581P0.html   (918 words)

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