ELECTRON MICROSCOPY: VESSELS: VASCULAR: CARDIOVASCULAR: VESSEL: Capillary. (EM-labeled); RCH/AMC33145, capillary (transverse section), one of the endothelial cells forming the capillary wall is fenestrated (top) and one of the other endothelial cells is non-fenestrated (right), erythrocyte, pericyte, rat uterus. e-erythrocyte,