<P> The lower part of the right half, below the transverse colon, is covered by peritoneum continuous with the inferior layer of the transverse mesocolon, and is in contact with the coils of the small intestine . </P> <P> The superior mesenteric artery passes down in front of the left half across the uncinate process; the superior mesenteric vein runs upward on the right side of the artery and, behind the neck, joins with the lienal vein to form the portal vein . </P> <P> The pancreas receives blood from branches of both the coeliac artery and superior mesenteric artery . The splenic artery runs along the top margin of the pancreas, and supplies the neck, body and tail of the pancreas through its pancreatic branches, the largest of which is called the greater pancreatic artery . The superior and inferior pancreaticoduodenal arteries run along the anterior and posterior surfaces of the head of the pancreas at its border with the duodenum . These supply the head of the pancreas . </P> <P> The body and neck of the pancreas drain into the splenic vein; the head drains into the superior mesenteric and portal veins . </P>

What type of tissue is the pancreas made of