Extending down the interventricular septum, they form desmosomes with muscle. They are  responsible for the QRS complex and work by depleting tubular calcium stores. They are shaped like a (*) barrel, and reach up the walls of the ventricles to stimulate the epicardium. Stimulated by the SA and AV nodes, for 10 points— name these components that carry the conduction of the bundle of His to the rest of the heart.
Extending down the interventricular septum, they form desmosomes with muscle. They are  responsible for the QRS complex and work by depleting tubular calcium stores. They are shaped like a (*) barrel, and reach up the walls of the ventricles to stimulate the epicardium. Stimulated by the SA and AV nodes, for 10 points— name these components that carry the conduction of the bundle of His to the rest of the heart.
Extending down the interventricular septum, they form desmosomes with muscle.
Purkinje fibers (do not accept "Purkinje cells")