ELECTRON MICROSCOPY: GASTROINTESTINAL: GI: SMALL BOWEL: VILLI, ILEUM, labeled; Scanning Electron Micrograph, VILLI ILEUM SMALL INTESTINE. C= CONNECTIVE TISSUE OF LAMINA PROPRIA, E = EPITHELIUM. A = LUMINAL SURFACE OF VILLUSTAN. COLORING IS AN INDIVIDUAL VILLUS WITH PART OF ITS SURFACE EPITHLIUM MISSING.