Figure 2: Transmission electron micrograph of a lymphatic vessel, a vein and an artery in a normal rat tail. (a) Lymphatic vessel. SMC, LSMC; L, lumen; EC, endothelial cell; C, collagen; F, fibroblast. Original magnification × 4,000. (b) Vein. SMC, vascular smooth muscle cell; L, lumen; EC, endothelial cell; C, collagen; F, fibroblast. Original magnification × 3,000. (c) Artery. SMC, vascular smooth muscle cell; EL, elastic lamina; L, lumen; RBC, red blood cell; EC, endothelial cell; C, collagen; F, fibroblast. Original magnification × 4,000.