Anatomy. The (external) jugular vein is located superficially under the skin on both sides of the neck, running in a caudodorsal direction from dorsal aspect of the tympanum to the coelomic cavity.

The external and internal jugular veins are joined by the subclavian vein, which enters the right atrium of the heart as the cranial vena cava (Fig. 1). Figure 1: Dissection of the cranial thorax ...