Fluid which nourishes the brain excretes waste provides cushion and buoyancy to brain?

Cerebrospinal fluid (CSF) is a clear, colorless fluid that fills the ventricles of the brain and the subarachnoid space, which is the space between the brain and the skull. CSF provides nourishment and oxygen to the brain and spinal cord, removes waste products, and provides a cushion and buoyancy to the brain, protecting it from injury. CSF is produced by the choroid plexus, which is a network of blood vessels located in the ventricles of the brain. CSF flows through the ventricles and the subarachnoid space and is then absorbed into the bloodstream through the arachnoid villi, which are small, finger-like projections of the arachnoid membrane, which is the middle layer of the meninges, which are the three layers of tissue that surround the brain and spinal cord.