Liver: The liver is divided into two lobes: right and left. Hexagonally shaped lobules make up each lobe. These lobules are quite little, each made up of several hepatocytes (liver cells) that are arranged in radiating rows.

Gallbladder: The gallbladder is a muscular sac with a simple columnar epithelium lining it. In humans, it absorbs and contains bile from the liver through the hepatic and then cystic ducts, with a capacity of 50 to 100ml. It is linked to the liver's visceral layer.

Duodenum: The duodenum has three layers, which are similar to all hollow organs of the GIT, but it also has Brunner's glands, which are the duodenum's distinguishing feature. It is the first of the three segments of the small intestine, receiving partly digested food from the stomach and beginning nutrient uptake. It is directly connected to the stomach's pylorus.

Read more at: https://www.upmc.com/services/liver-cancer/liver/anatomy-liver#:~:text=Lobules,lineupinradiatingrows. https://www.histology.leeds.ac.uk/digestive/gallbladder.php https://www.kenhub.com/en/library/anatomy/the-duodenum