ELECTRON MICROSCOPY: CELL: Microvillous (striate, brush) border and terminal web. (EM-labeled), colon; RCH/AMC710, absorptive epithelial cells of the mouse cecum (colon), two apposed microvilli-covered epithelial surfaces, actin bundles of microvilli inserting into terminal web. m-microvillous border, a-actin bundle, t-terminal web, *-colon