The straight sinus is a large venous channel located in the brain. It is part of the dural venous sinuses, which are responsible for draining blood from the brain. The straight sinus runs along the junction of the falx cerebri and the tentorium cerebelli, collecting blood from the great cerebral vein and other smaller veins. This sinus ultimately drains into the transverse sinuses, which further channel blood toward the heart. The straight sinus plays a crucial role in maintaining proper blood flow and pressure within the brain, ensuring that waste products are efficiently removed.