Babies are born with about 300 bones. This number may seem surprisingly high compared to the 206 bones adults have. The reason for this difference is that many of a baby's bones are still in the process of developing and fusing together.
As a baby grows, some of these separate bones will gradually fuse together, forming the larger bones that make up the adult skeleton. This process is called ossification.
For example, a baby's skull is made up of several separate bones that allow for flexibility during childbirth. These bones eventually fuse together to form the solid structure of an adult skull.
