What is the primary function of the jugular veins?

The primary function of the jugular veins is to transport deoxygenated blood from the head and neck back to the heart. These veins collect blood that has delivered oxygen and nutrients to the brain and face and has gathered carbon dioxide and other waste products for removal. The internal jugular vein drains blood from the brain, while the external jugular vein drains blood from the face and neck regions. This process is crucial for maintaining proper blood circulation and ensuring that waste products are efficiently removed from the head and neck area.

In the context of the other choices, supplying oxygenated blood to the brain is the role of the carotid arteries, not the jugular veins. Returning lymph to the cardiovascular system is primarily the function of the lymphatic system, and draining blood from the heart pertains to the role of the coronary veins and other venous structures, not the jugular veins.