You started life with more separate bones than you have today. 🦴👶
Most adults have 206 bones.
But newborns are commonly described as having around 270 skeletal bones or separate bony elements, depending on how they are counted.
So where did the difference go?
Many of these bones don't disappear.
They gradually fuse together as the body develops.
This happens in several parts of the skeleton, including areas of the skull, pelvis and spine. What begins as separate pieces can eventually become larger, more unified structures.
And there's an amazing reason a baby's skull is built this way.
A newborn's skull contains several bones separated by flexible sutures, with soft membranous areas called fontanelles between some of them.
Those soft spots allow the skull to deform slightly during childbirth and provide flexibility while the baby's rapidly growing brain expands. ðŸ§
Over the following months and years, the skull gradually becomes more rigid as these structures develop and close.
So the skeleton you see in an adult isn't exactly the same arrangement you started with.
Your bones didn't simply grow bigger.
Some of them changed shape, developed, and fused as you grew into the person you are today.
Your skeleton has been under construction since before you could even walk.
