Final answer:
The venous drainage from the brain is a complex process involving smaller veins leading to larger vessels called sinuses. Ultimately, the sinuses drain into the inferior jugular vein or vertebral vein, which carries blood back to the heart.
Step-by-step explanation:
The venous drainage of the brain is a critical and complex process. Many smaller veins in the brain stem and cerebrum lead to larger vessels called intracranial sinuses. These sinuses include the superior sagittal sinus, inferior sagittal sinus, straight sinus, cavernous sinuses, petrosal sinuses, and occipital sinuses. Ultimately, the sinuses drain into either the inferior jugular vein or vertebral vein, which leads back to the heart.