Why are bone curvatures more common in children, and fractures in older people?

The bones of the elderly are brittle. They are low in calcium, so they break with any minor injury. There is such a thing as a pathological fracture – when the force of impact is not enough to break a healthy bone. It is in the elderly that such fractures occur. The bones of children are thin. They have a thick and strong periosteum that prevents them from breaking. But due to active growth, the bones of children can be bent if they lack some elements, for example, with rickets – a deficiency of vitamin D.