THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Final answer: Hepatic Lobules are the structural and functional unit of the liver.

Detailed explanation-2: -In histology (microscopic anatomy), the lobules of liver, or hepatic lobules, are small divisions of the liver defined at the microscopic scale.

Detailed explanation-3: -The acinus is a unit that contains a small portal tract at the center and terminal hepatic venules at the periphery. It is the smallest functional unit and is divided into zones 1, 2, and 3, wherein zone 1 surrounds the portal tract and zone 3 surrounds the hepatic venule.

Detailed explanation-4: -The liver lobes are made up of microscopic units called lobules which are roughly hexagonal in shape. These lobules comprise of rows of liver cells (hepatocytes) which radiate out from a central point.