Editing Stomach (section)

==Development==
In the early part of the [[human embryogenesis|development of the human embryo]], the ventral part of the embryo abuts the [[yolk sac]]. During the third week of development, as the embryo grows, it begins to surround parts of the yolk sac. The enveloped portions form the basis for the adult gastrointestinal tract.<ref name=LARSEN2009 /> The sac is surrounded by a network of [[vitelline arteries|vitelline arteries and veins]]. Over time, these arteries consolidate into the three main arteries that supply the developing gastrointestinal tract: the [[celiac artery]], [[superior mesenteric artery]], and [[inferior mesenteric artery]]. The areas supplied by these arteries are used to define the [[foregut]], [[midgut]], and [[hindgut]].<ref name=LARSEN2009 /> The surrounded sac becomes the primitive gut. Sections of this gut begin to differentiate into the organs of the gastrointestinal tract, and the esophagus, and stomach form from the foregut.<ref name=LARSEN2009>{{cite book|author=Gary C. Schoenwolf |title=Larsen's human embryology|year=2009|publisher=Churchill Livingstone/Elsevier|location=Philadelphia|isbn=978-0-443-06811-9|chapter=Development of the Gastrointestinal Tract|edition=4th}}</ref>

As the stomach rotates during early development, the dorsal and ventral mesentery rotate with it; this rotation produces a space anterior to the expanding stomach called the greater sac, and a space posterior to the stomach called the lesser sac. After this rotation the dorsal mesentery thins and forms the greater [[Greater omentum|omentum]], which is attached to the greater curvature of the stomach. The ventral mesentery forms the lesser omentum, and is attached to the developing [[liver]]. In the adult, these connective structures of omentum and mesentery form the [[peritoneum]], and act as an insulating and protective layer while also supplying organs with [[blood]] and lymph vessels as well as nerves.<ref name="SADLER">Sadler, T.W, (2011) Langman’s Medical Embryology (12th edition), LWW, Baltimore, MD</ref> Arterial supply to all these structures is from the [[celiac trunk]], and venous drainage is by the [[portal venous system]]. Lymph from these organs is drained to the prevertebral celiac nodes at the origin of the celiac artery from the [[aorta]].