What is "third ventricle"?

The third ventricle is a fluid-filled cavity located in the brain, specifically within the diencephalon region. It is one of the four interconnected ventricles that play a crucial role in the circulation and production of cerebrospinal fluid. The third ventricle is positioned between the two halves of the brain and communicates with other ventricles through narrow channels known as the foramen of Monro. It serves as a vital pathway for the exchange of nutrients and waste products, contributing to the overall regulation of brain function and homeostasis.