Nerves A Rainbow of the Conduction System and Arterial System of the HeartA Barium infusion of a heart specimen is rendered to create an artistic and educational art piece. The LAD is overlaid in bright red and the RCA in maroon.The nerve supplying the heart (yellow) innervates the SA node (orange) which sends the neural message via the bundle of His (green) to the right bundle (pink) and main left bundle (teal ) giving rise to an anterior division(light blue) and a posterior division (royal blue).Ashley Davidoff MD Copyright 201833805SAAV07.8s