The deep facial vein courses from the pterygoid plexus to the facial vein. The lingual veins begin on the dorsum (top), sides, and undersurface of the tongue. They pass backward, following the course of the lingual artery and its branches, and terminate in the internal jugular vein.
The internal jugular vein, which corresponds to the common carotid artery, empties into the superior vena cava, which returns blood from the upper portion of the body to the right atrium of the heart.