The cranial cavity is the space within the skull that houses and protects the brain. It is formed by the bones of the skull, which create a rigid structure that safeguards the delicate tissues of the brain from injury. The cranial cavity also contains cerebrospinal fluid, which cushions the brain and helps maintain its shape. In addition to the brain, the cranial cavity contains important structures such as the meninges, which are protective membranes, and various blood vessels and nerves. This cavity plays a crucial role in supporting the brain's functions and ensuring its proper operation within the nervous system.