Final answer:
The fluid-filled cavities in the brain are called ventricles, which contain cerebrospinal fluid (CSF) that cushions the brain, removes wastes, and circulates nutrients. CSF is produced by the choroid plexus and is essential for the brain's protection. Imbalance in CSF production or circulation can lead to neurological issues such as hydrocephalus.
Step-by-step explanation:
The fluid-filled cavities in our brain are known as ventricles. These ventricles are part of the ventricular system which is filled with cerebrospinal fluid (CSF). CSF is a clear bodily fluid that occupies the subarachnoid space around and inside the brain and spinal cord, providing a cushion or buffer for the brain's cortex and protecting it from injury within the skull. In addition, the CSF circulatory system removes metabolic wastes and circulates nutrients throughout the central nervous system (CNS).
The brain and spinal cord make up the continuous CNS structure, housed within the posterior (dorsal) body cavity, specifically the cranial and spinal cavities. CSF is continuously produced by the choroid plexus, a specialized membrane composed of ependymal cells that filter blood to create the CSF. This system is vital for mechanical and immunological protection and helps maintain the proper chemical environment for the CNS.
If there is an imbalance in CSF production, circulation, or reabsorption, conditions such as hydrocephalus can occur, leading to neurological issues due to increased pressure on the brain.