Electrical Enclosure Comparisons of NEMA and UL Type Rating Standards. When it comes to electrical safety in the USA there are two main organizations who set safety standards: NEMA (the National Electrical Manufacturers Association) and UL (Underwriters Laboratories). NEMA is the association of electrical equipment and medical imaging manufacturers in the United States.
View of the Liver and Gallbladder. Bile empties from the gallbladder into the common bile duct. The common bile duct joins with the pancreatic duct to form the ampulla of Vater, which empties into the duodenum. Before joining the pancreatic duct, the common bile duct tapers to a diameter of â¤ 0.6 cm. The sphincter of Oddi, which surrounds both the pancreatic duct and the common bile duct, includes a sphincter for each duct. Bile does not normally flow retrograde into the pancreatic duct.
Once the common hepatic duct is filled, the bile flows into the cystic duct and then into the gallbladder where it is stored. The gallbladder allows the bile to flow back into the cystic duct and then the common bile duct which empties into the duodenum. The hepatocytes in the liver produce bile, which then flows through the left and right hepatic ducts to the common hepatic duct. Once the common hepatic duct is filled, the bile flows into the cystic duct and then into the gallbladder where it is stored.