what is the top of the skull called
Skull The skull consists of two parts, of different embryological originâ€”the neurocranium and the facial skeleton (also called the membraneous viscerocranium). The neurocranium (or braincase) forms the protective cranial cavity that surrounds and houses the brain and brainstem. The upper areas of the cranial bones form the calvaria (skullcap). The neurocranium includes the mandible.
Central nervous system The central nervous system consists of the two major structures: the brain and spinal cord. The brain is encased in the skull, and protected by the cranium.[7] The spinal cord is continuous with the brain and lies caudally to the brain,[8] and is protected by the vertebrae.[7] The spinal cord reaches from the base of the skull, continues through[7] or starting below[9] the foramen magnum,[7] and terminates roughly level with the first or second lumbar vertebra,[8][9] occupying the upper sections of the vertebral canal.[4]