Cranial development refers to the growth and formation of the skull, which protects the brain and supports facial structure. This process begins in the womb, where the skull is made up of several bones that are not yet fused. These bones allow for flexibility during childbirth and accommodate the rapid growth of the brain during infancy. As a child grows, the bones of the skull gradually fuse together, a process that typically completes by the late teenage years. Proper cranial development is essential for overall health, as it ensures adequate space for the brain and can influence facial symmetry and cognitive function.