Which small ducts drain bile directly into the gallbladder from the liver?

The ducts that directly drain bile into the gallbladder from the liver are known as the Ducts of Luschka. These small, accessory ducts are located at the liver's surface and play a crucial role in providing an additional route for bile to flow into the gallbladder. They are considered important because they can serve as a pathway for bile drainage, particularly if the main hepatic ducts are obstructed or if there is a variation in the anatomy of the biliary tree.

The other options, while related to bile drainage, serve different functions or locations in the biliary system. The choledochus ducts and common bile duct primarily transport bile from the liver and gallbladder to the duodenum, but they do not drain directly into the gallbladder. The hepatic ducts collect bile from the liver's lobes and transport it towards the common bile duct, but again, they do not directly drain into the gallbladder.

Thus, the Ducts of Luschka are specifically responsible for draining bile directly into the gallbladder, making them the correct answer to this question.