Midgut
4639041
208398394
2008-04-26T21:32:24Z
144.82.204.36
/* Clinical notes */
{{Infobox Embryology |
Name = {{PAGENAME}} |
Latin = |
GraySubject = |
GrayPage = |
Image = Illu small intestine.jpg|
Caption = The midgut and hindgut.|
Image2 = |
Caption2 = |
System = |
CarnegieStage = 10 |
Precursor = [[Mesenchyme]] |
GivesRiseTo = |
MeshName = |
MeshNumber = |
DorlandsPre = m_16 |
DorlandsSuf = 12535859 |
}}
The '''midgut''' is the portion of the [[embryo]] from which most of the [[intestines]] are derived. After it bends around the [[superior mesenteric artery]], it is called the "midgut loop". It originates from the [[foregut]] at the opening of the [[bile duct]] into the [[duodenum]] and continues through the small intestine and much of the large intestine until the transition to the [[hindgut]] about two-thirds of the way through the transverse colon.
==Structures in the adult midgut==
* [[Duodenum]] (3rd and 4th parts)
* [[Jejunum]]
* [[Ileum]]
* [[Cecum]]
* [[Appendix]]
* [[Ascending colon]]
* [[Hepatic flexure]] of colon.
* [[Transverse colon]] (proximal two-thirds)
==Vascular, lymphatics and innervation==
Arterial supply to the midgut is from the [[superior mesenteric artery]], an unpaired branch of the [[aorta]]. Venous drainage is to the [[portal venous system]]. Lymph from the midgut drains to prevertebral '''superior mesenteric nodes''' located at the origin of the superior mesenteric artery from the aorta. Portal drainage carries all non-lipid nutrients from digestion to the liver for processing and detoxification, while lymphatic drainage carries fatty chyle to the [[cisterna chyli]]. Autonomic innervation of the midgut is from the [[superior mesenteric plexus]].
==Clinical notes==
* Malrotation of the midgut during development can lead to [[volvulus]].
* Pain in the midgut is referred to the umbilical region (around the umbilicus (belly button)).
==See also==
* [[Foregut]]
* [[Hindgut]]
==External links==
* {{EmbryologyUNC|digest|020}}
* {{eMedicine|radio|450}} - "Midgut Volvulus"
* {{Chorus|00494}}
* [http://www.med.umich.edu/lrc/coursepages/M1/embryology/embryo/10digestivesystem.htm Umich.edu - development]
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{{Development of digestive system}}[[Category:Embryology]]
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