The right and left hepatic ducts emerge from the right lobe of the liver in the porta hepatis and unite to form the:

common hepatic duct

Explanation:

The common hepatic duct is formed by the union of the right and left hepatic ducts emerging out from the right lobe of the liver. The right hepatic duct is responsible for draining bile from the right half of the body whereas the left hepatic duct drains it from the left side of the body. At the junction of the right and left hepatic duct, the common hepatic duct gets formed which then joins the cystic duct and then the common bile duct is formed.