Final answer:
The Main Lobar Fissure divides the right and left lobes of the liver and is visible from the portal vein to the gallbladder.
Step-by-step explanation:
The Main Lobar Fissure divides the right and left lobes of the liver. It appears as a thin hypoechoic line from the portal vein to the gallbladder. The liver is a vital organ composed of hepatocytes, bile canaliculi, and hepatic sinusoids with the hepatocytes forming the bulk of the liver's volume.
Hepatic lobules radiate from the portal vein, and blood supply to the liver is provided by the hepatic artery and the portal vein, with the artery delivering oxygen-rich blood and the vein bringing nutrient-rich blood from the GI tract and spleen-influenced waste.