ELECTRON MICROSCOPY: HEPATOBILIARY: LIVER: Liver, hepatocyte. (EM-labeled); RCH/AMC48168, rat liver. 1-rough endoplasmic reticulum, 2-smooth endoplasmic reticulum, 3-mitochondrion, 4-peroxisome, 5-bile canaliculus (sectioned longitudinally), 6-glycogen