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The pancreas is an organ of the digestive system and endocrine system of vertebrates. In humans, it is located in the abdomen behind the stomach and functions as a gland. The pancreas is a mixed or heterocrine gland, i.e., it has both an endocrine and a digestive exocrine function. [2] 99% of the pancreas is exocrine and 1% is endocrine.
In human anatomy, the superior mesenteric artery (SMA) is an artery which arises from the anterior surface of the abdominal aorta, just inferior to the origin of the celiac trunk, and supplies blood to the intestine from the lower part of the duodenum through two-thirds of the transverse colon, as well as the pancreas.
A ruptured aneurysm causes abdominal pain, and haemorrhage leads to hypotension. [3] It may be treated with open abdominal surgery. [3] It may also be treated with endovascular surgery, such as a coil. [3] [4] These aneurysms represent around 2% of aneurysms in visceral arteries of the abdomen. [4] [5] Pseudoaneurysm may also occur. [6]
Tributaries of the superior mesenteric vein drain the small intestine, large intestine, stomach, pancreas and appendix and include: Right gastro-omental vein (also known as the right gastro-epiploic vein) inferior pancreaticoduodenal veins; veins from jejunum; veins from ileum; middle colic vein – drains the transverse colon
The celiac artery supplies the liver, stomach, spleen and the upper 1/3 of the duodenum (to the sphincter of Oddi) and the pancreas with oxygenated blood. Most of the blood is returned to the liver via the portal venous system for further processing and detoxification before returning to the systemic circulation via the hepatic veins.
The artery supplies the anterior and posterior sides of the duodenum and head of pancreas, with the anterior branch supply the anterior surface and similarly for the posterior. The artery supplies the part of the duodenum proximal to the level of the major duodenal papilla of the descending part of the duodenum. [3]
Arterial supply Foregut: esophagus to first 2 sections of the duodenum: Esophagus, stomach, duodenum (1st and 2nd parts), liver, gallbladder, pancreas, superior portion of pancreas (Though the spleen is supplied by the celiac trunk, it is derived from dorsal mesentery and therefore not a foregut derivative) celiac trunk Midgut
One of these, larger than the rest, is sometimes given off near the tail of the pancreas; it runs from left to right near the posterior surface of the gland, following the course of the pancreatic duct, and is called the greater pancreatic artery.