The ventricles are formed by four hollow and interconnected spaces within the brain.
In a pool of cerebrospinal fluid, the brain floats. Deep inside your brain, in a structure known as the ventricles, this fluid also fills sizable open spaces. The brain is buoyant and cushioned by the fluid-filled ventricles.
The ventricles of the brain are a network of interconnected cavities inside the brain parenchyma that are filled with cerebrospinal fluid (CSF). The cerebral aqueduct, the third ventricle, the second lateral ventricle, and the fourth ventricle make up the ventricular system. Following a cycle of continuous production and reabsorption, the choroid plexuses, which are found in the ventricles, create CSF, which fills the ventricles and subarachnoid space. The choroid plexus, a specialized membrane composed of ependymal cells, lines the ventricles.
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