Editing Duodenum (section)

===Histology===
Under [[microscopy]], the duodenum has a [[Intestinal villus|villous]] [[mucosa]]. This is distinct from the mucosa of the [[pylorus]], which directly joins the duodenum. Like other structures of the [[Gastrointestinal wall|gastrointestinal tract]], the duodenum has a [[mucosa]], [[submucosa]], [[muscularis externa]], and [[adventitia]]. Glands line the duodenum, known as [[Brunner's gland]]s, which secrete [[mucus]] and [[bicarbonate]] in order to neutralise stomach acids. These are distinct glands not found in the ileum or jejunum, the other parts of the small intestine.<ref name="WHEATERS2006">{{cite book|last=Deakin|first=Barbara Young  |display-authors=etal |title=Wheater's functional histology : a text and colour atlas|year=2006|publisher=Churchill Livingstone/Elsevier|location=[Edinburgh?]|isbn=978-0-443-06850-8|edition=5th}}</ref>{{rp|274–275}}
<gallery>
 File:Dogduodenum100x3.jpg|Dog duodenum 100X
 Image:Small bowel duodenum with amyloid deposition congo red 10X.jpg|Duodenum with amyloid deposition in lamina propria
 Image:Gray1058.png|Section of duodenum of cat. X 60
 Image:Giardiasis duodenum low.jpg |[[Micrograph]] showing [[giardiasis]] on a duodenal biopsy ([[H&E stain]])
 Image:Microvilli-Duodenum.JPG|Duodenum with brush border ([[microvilli|microvillus]])
</gallery>