Newborn babies are born with approximately 270 to 300 bones.

As they grow, many of these bones fuse together — especially in the skull and spine — resulting in 206 bones in the average adult skeleton.

Example: The bones in the skull start as multiple pieces to allow flexibility during birth and growth.

Ossification (bone fusion) occurs gradually throughout childhood and adolescence.
Newborn babies are born with approximately 270 to 300 bones. As they grow, many of these bones fuse together — especially in the skull and spine — resulting in 206 bones in the average adult skeleton. Example: The bones in the skull start as multiple pieces to allow flexibility during birth and growth. Ossification (bone fusion) occurs gradually throughout childhood and adolescence.
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