Final answer:
The internal jugular vein runs parallel to the common carotid artery, receives blood from superficial facial veins, and empties into the subclavian vein.
Step-by-step explanation:
The internal jugular vein is one of the major veins in the neck that plays a critical role in draining blood from the brain, face, and neck. It runs parallel to the common carotid artery and within the carotid sheath, illustrating its anatomical relationship with significant neighboring structures. Not only does it drain blood from the brain but it also receives blood from superficial facial veins, such as the facial and lingual veins. The internal jugular vein ultimately empties into the subclavian vein, which then carries the blood back to the heart. The external jugular vein, on the other hand, drains more superficial parts of the head and neck and has anastomoses with the internal jugular vein near the thoracic region.