Please confirm that you are not located inside the Russian Federation
The link you have selected will take you to a third-party website. We do not control or have responsibility for the content of any third-party site.
The brain consists of a network of four cavities that are filled with circulating cerebrospinal fluid (CSF). They include the two large lateral ventricles, the third ventricle, and a cerebral aqueduct connecting to the fourth ventricle.