Cholecystocaval line:-
Separate right anterior and right posterior sectors
Separate gall bladder from poal vein
Separate right and left hepatic lobes
Separate left medial and left lateral sectors
Cholecystovenacaval line: - Is an imaginary line which passes through groove for IVC to the gallbladder fossa and separates right & left hepatic lobe functionally.
NEET 2019