What is the primary function of the cranium?

The primary function of the cranium is to enclose the brain. This protective structure is essential because it safeguards the brain from physical trauma and injury, which can occur from impacts or falls. The cranium is composed of several bony plates that are fused together and form a rigid case around the brain, allowing for both protection and the maintenance of the brain's complex structure.

While the cranium also plays roles in providing some structural support to the facial bones and assists indirectly in overall head shape and jaw movement, its most critical and recognized function is the enclosure and protection of the brain. This is vital for the cerebral functions and overall neurological health of an individual.