As we sat waiting for the plane to depart, we decided to follow along with the pre-flight safety demonstration in our pamphlets. No matter how hard we tried, we could not shake off the impression that this was a vascular system we had seen before. We finally pinned it down to the vasculature below the Circle of Willis, minus the anterior and posterior inferior cerebellar arteries and others. Can you tell we studied too much?
Some concepts are just better understood through drawing and diagrams. Here I have made some quick sketches for reference. From upper left to lower right: hyoid bone, platysma muscle, cervical muscles, vessels and nerves of the anterior triangle, thoracic duct at angle of union with the left subclavian vein.