Part of the gall bladder peritoneum is continuous with a reflection of peritoneum on the liver's surface: what does this mean?

GB part of liver: The GB is embedded into the liver structure. The back wall of the GB is in direct contact with the liver cells. The front of the GB which wall has no submucosa has a peritoneal surface which courses onto the surface of the liver. When doing a GB resection, this peritoneal surface is incised on the top of the GB, and the GB then mobilized from the bed of the liver, leaving a raw surface behind.