Now at the beginning portion of our ascending A order, we have branching taking place and we form two smaller arteries given by one A. So these arteries right here are the left and the right coronary arteries. And these bring oxygenated and nutrient filled blood to the cells of our heart. Now if we follow the ascending A order, eventually we get to this arch. And this arch is commonly known as our aortic arch. Now, Aortic arch contains three important branching points.