<prompt> Which is not true regarding the basis of functional divisions of Liver?Based on poal vein and hepatic veinDivided into 8 segmentsThere are three major and three minor fissures4 sectors  <response>: Ans: B. Divided into 8 segmentsRef Grays 40e p1165, 1166,1178; Sabiston 20e p1484, 19e p1413-1417; Schwaz 10e p1265, 9e p1095; Bailey 27e p1154, 26e p1065-1067; Blumga 5e p31-37; Shackelford 7e p1426-1430Most preferred option:Liver is divided into 8 segments.Segment IX - Aecent subdivision of segment I.Describes segment posterior to segment VIII.Functional anatomy of liver:Based on Couinauds division of liver Coninaud I957.Divided into eight subsequently nine functional segments.This is based upon distribution of poal venous branches hepatic veins location in parenchyma.Sectors segments of liver:Sectors of liver:Between one three segments:Right lateral sector Segments VI VII.Right medial sector Segments V VIII.Left medial sector Segments III IV and pa of I.Left lateral sector Segment II.Segments of liver:Numbered in an ante-clockwise spiral centered on poal vein with liver viewed from beneath.Staing with segment I up to segment VI a then back clockwise for most cranial two segments VII VIII.Fig 1: The fissures and sectors of the liver. Right lateral right posterior; right medial right anteriorFig 2: Segments of the liver after Couinaud. A superior view; B posterior view; C anterior view; D inferior view. 