I AM NOW MAKING MY EIGHTH SKULL
Your skeleton is so out of sight, out of mind that you probably don’t give it much thought. But get this — the entire thing regenerates about every 10 years. Composed of bone marrow, cortical bone, and cancellous bone, the skeleton doesn’t just grow into its adult size and remain the same; it remodels constantly in order to replace old or fractured bones with new ones while maintaining healthy cells and providing calcium to the rest of the body. Bones are made up living tissue encased in a hard outer shell, so although they appear completely solid, the cells within are functioning and responding to their environment. For instance, bones strengthen to combat fractures when exposed to stress (such as weightlifting) and weaken when there is a lack of stress (such as bed rest). But, make no bones about it, each year approximately 10% of your skeleton renews itself.
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