Explain the Ventricles of the brain.

Explanation

The brain has four hollow, fluid filled spaces. The C-shaped space found inside each cerebral hemisphere forms the lateral ventricles I and II which are separated from each other by a thin membrane called the septum pellucidum. Each lateral ventricle communicates with the narrow III ventricle in the diencephalon through an opening called interventricular foramen (foramen of Monro). The ventricle III is continuous with the ventricle IV in the hind brain through a canal called aqueduct of Sylvius (cerebral aqueduct). Choroid plexus is a network of blood capillaries found in the roof of the ventricles and forms cerebro spinal fluid (CSF) from the blood. CSF provides buoyancy to the CNS structures, CSF acts as a shock absorber for the brain and spinal cord, it nourishes the brain cells by transporting constant supply of food and oxygen, it carries harmful metabolic wastes from the brain to the blood, and maintains a constant pressure inside the cranial vessels.