The square lobe receives the portal branches from the portal sinus and from the intrahepatic portion of the umbilical vein during week 6.
(2016, 2017, 2018) contributed to the study of the hepatic portal vein as it follows: the left portal branch presents a transverse part (A12.3.12.006) of 3-4 cm long and 12 mm of diameter; it derives from the embryonic portal sinus and emits branches for segment I in 100 %, segment V in 21 % of cases and subsegmental branches for segment IV (square lobe); and another umbilical part (A12.3.12.008) of 1-2 cm long and 10 mm of diameter (it derives from the umbilical vein); both form a 90-degree angle of anterior medial sinus.
The 40X objective was used to capture ten microscopic fields of the liver slices to determine total area, and nucleus area of hepatocytes that were peripheral to the central vein and ten hepatocytes peripheral to the portal space of the square lobe, right lobe and left medial lobe.
The hepatocytes area in the portal space and central vein of the square lobe, in the group with the obesogenic diet, was significantly greater when compared to the group without the oil (P<0.0001 and P<0.001, respectively).
Also, the area of the nuclei situated on the central vein of the square lobe (P<0.001) and the left medial lobe were greater in the animals with the obesogenic diet (P<0.01) (Fig.