[TA] it is separated from the much larger right lobe anterior and superior to the falciform and coronary ligaments, and from the quadrate and caudate lobes by the fissure for the ligamentum teres and the fissure for the ligamentum venosum. The lobes of the liver are not functional units, being defined by external structures; the distribution of the portal vein, hepatic artery, and bile ducts does not correspond to the gross lobar divisions of the liver. SYN: lobus hepatis sinister [TA], divisio lateralis sinistra*.