Which is NOT a systemic neck vein?

The anterior facial vein is classified as a superficial vein rather than a systemic neck vein. Systemic veins are those that return deoxygenated blood from the body back to the heart. The internal jugular vein, external jugular vein, and vertebral vein are all major vessels that play roles in draining blood from the head and neck region directly back to the heart, integrating into the systemic venous system.

Understanding the anatomy and function of these veins is crucial. The internal jugular vein is one of the primary veins responsible for draining blood from the brain and face, while the external jugular vein drains blood from the exterior structures of the head. The vertebral vein drains the spinal column and helps connect with the systemic circulation. In contrast, the anterior facial vein primarily drains blood from the face and is part of the facial venous system, which is more localized and not considered part of the systemic venous return to the heart. Thus, recognizing the distinct roles of these veins aids in identifying which one does not fit the category of systemic neck veins.