Changes

==Introduction==

==Introduction==

[[Image:jejunumphoto.jpg|thumb|right|250px|Jejunum(Dog) - © RVC 2008]]

[[Image:jejunumphoto.jpg|thumb|right|250px|Jejunum(Dog) - © RVC 2008]]

It occupies the ventral part of the abdominal cavity, filling those parts that are not occupied by other viscera. This produces species variation (see [[#Species Differences|species differences]]). It lies on the abdominal floor, separated from the parietal [[Peritoneal Cavity - Anatomy & Physiology|peritoneum]] by the greater omentum. It is suspended by the mesentry (mesojejunum). This conveys the blood vessels and nerves and houses lymph nodes. The mesentry converges to its root. This is where the cranial mesenteric artery branches off from the aorta.

Jejunum occupies the ventral part of the abdominal cavity, filling those parts that are not occupied by other viscera. This produces species variation (see [[#Species Differences|species differences]]). It lies on the abdominal floor, separated from the parietal [[Peritoneal Cavity - Anatomy & Physiology|peritoneum]] by the greater omentum. It is suspended by the mesentery (mesojejunum). This conveys the blood vessels and nerves and houses lymph nodes. The mesentery converges to its root. This is where the cranial mesenteric artery branches off from the aorta.

==Vasculature==

==Vasculature==

The cranial mesenteric artery, a branch of the abdominal aorta, supplies blood to the jejunum, [[Ileum - Anatomy & Physiology|ileum]], [[Caecum - Anatomy & Physiology|caecum]], [[Colon - Anatomy & Physiology|ascending colon]] and part of the [[Colon - Anatomy & Physiology|transverse colon]]. It branches greatly within the mesenty of the jejunum. There are many anastomoses within the mesentry, which ensure that the intestine can survive even if a major division of the cranial mesenteric is damaged. The cranial mesenteric vein drains blood from the jejunum and enters the portal vein. It is rich in the products of digestion following a meal. The portal vein enters the [[Liver - Anatomy & Physiology|liver]].

The cranial mesenteric artery, a branch of the abdominal aorta, supplies blood to the jejunum, [[Ileum - Anatomy & Physiology|ileum]], [[Caecum - Anatomy & Physiology|caecum]], [[Colon - Anatomy & Physiology|ascending colon]] and part of the [[Colon - Anatomy & Physiology|transverse colon]]. It branches greatly within the mesentery of the jejunum. There are many anastomoses within the mesentery, which ensure that the intestine can survive even if a major division of the cranial mesenteric artery is damaged. The cranial mesenteric vein drains blood from the jejunum and enters the portal vein. It is rich in the products of digestion following a meal. The portal vein enters the [[Liver - Anatomy & Physiology|liver]].

==Species Differences==

==Species Differences==

==Links==

==Links==

'''Click here for information on [[Intestines, Small and Large - Pathology|pathology of the Small and Large Intestines]]'''  

'''Click here for information on [[Intestines, Small and Large - Pathology|pathology of the Small and Large Intestines]]'''  

*[http://stream2.rvc.ac.uk/Anatomy/bovine/Pot0048.mp4 Pot 48 The Small and Large intestine of the Ruminant]

*[http://stream2.rvc.ac.uk/Anatomy/bovine/Pot0052.mp4 Pot 52 Lateral view of the Abdomen of a young Ruminant]

|videos = [[Video: Ruminant small and large intestine potcast|Ruminant small and large intestine potcast]]<br>[[Video: Ruminant abdomen potcast|Ruminant abdomen potcast]]<br>[[Video: Foal gastrointestinal tract potcast|Foal gastrointestinal tract potcast]]<br>[[Video: Lateral view of the feline thorax and abdomen potcast|Lateral view of the feline thorax and abdomen potcast]]<br>[[Video: Female dog abdomen dissection|Female dog abdomen dissection]]<br>[[Video: Abdominal viscera of the horse dissection|Abdominal viscera of the horse dissection]]<br>[[Video: Equine left-sided abdominal and thoracic topography dissection|Equine left-sided abdominal and thoracic topography dissection]]<br>[[Video: Equine left-sided abdominal and thoracic topography dissection 2|Equine left-sided abdominal and thoracic topography dissection 2]]<br>[[Video: Ovine large and small intestine dissection|Ovine large and small intestine dissection]]<br>[[Video: Porcine abdomen dissection|Porcine abdomen dissection]]

*[http://stream2.rvc.ac.uk/Anatomy/canine/Pot0036.mp4 Pot 36 The Canine Abdomen]

|powerpoints = [[Gastrointestinal Tract Histology resource|Histology of the jejunum - see part 1]]

*[http://stream2.rvc.ac.uk/Anatomy/equine/Pony_abdomen.mp4 Lateral View of the Equine Abdomen]

|Vetstream = [https://www.vetstream.com/canis/Content/Disease/dis02601.asp Ileus]

*[http://stream2.rvc.ac.uk/Frean/Pony/right_topography.mp4 Right sided topography of the Equine Abdomen]

*[http://stream2.rvc.ac.uk/Frean/sheep/LargeSmallIntestine.mp4 Small and Large intestine of the Sheep]

*[http://stream2.rvc.ac.uk/Anatomy/swine/Pig_abdomen.mp4 The Porcine Abdomen]

 

[[Category:Small Intestine - Anatomy & Physiology]]

[[Category:Small Intestine - Anatomy & Physiology]]

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[[Category:A&P Done]]