What is "internal jugular vein"?

The internal jugular vein is a large vein located in the neck that drains deoxygenated blood from the brain, face, and neck. It runs alongside the internal carotid artery and plays a vital role in returning blood to the heart. The internal jugular vein is an important route for the delivery of oxygen-poor blood from the head and neck, ultimately contributing to the overall circulatory function of the body.