Plate 4: Figure 9: A photomicrograph showing the inter bundle elastic fibers (arrow), and the myocardium (MYO). Stain: Weigert’s Resorcin Fuchsin Obj.x10: Oc.x10. Figure 10: showing the inter bundle collagen fibers (arrow) and the myocardium (MYO). Stain: Azan Obj.x10: Oc.x10. Figure 11 and 12: showing the purkinje fibers bundles within the myocardium. Stain: 11, 12) H&E 11, 12) Obj.x10: Oc.x10.