The cavities within the brain and spinal cord that contain CSF are called what?

• A. Meninges
• B. Cerebrospinal Fluid
• C. Ventricles
• D. Subarachnoid Space

Answer: (C)

CSF is stored in cavities called the ventricles. These interconnected spaces inside the brain—the lateral ventricles, third ventricle, and fourth ventricle—form the ventricular system and are filled with cerebrospinal fluid to provide buoyancy, protection, and nutrient transport. The other options describe different structures: the meninges are protective membranes around the brain and spinal cord; cerebrospinal fluid is the fluid itself, not a cavity; and the subarachnoid space is a CSF-filled region outside the brain tissue, between the arachnoid and pia mater, not a cavity within the brain or spinal cord. Thus, the cavities that contain CSF within the brain are the ventricles.