The skull is composed of two parts: the cranium and the mandible.
In the human, cranium has two parts the neurocranium and the viscerocranium.
The neurocranium forms the cranial cavity that surrounds and protects the brain and brainstem.
The neurocranium consists of the occipital bone, two temporal bones, two parietal bones, the sphenoid, ethmoid, and frontal bones—all are joined together with sutures. Hence, The brain is protected by the Cranium.