With an ever-growing ageing population the strain on global medical services becomes a significant dilemma. The status of the bone is one of the major complaints by the elderly. Even today, little is known about the bone's nano and micro structural-functional relationship under applied stresses and about the function of the collagen polymer. In this article, this relationship is investigated, revealing that on microcracking open and closed pores are present. A crisscross nanostructure is essential to the bone's re-healing process. Mechanisms are proposed which are in agreement with an earlier hypothesis that could not previously be substantiated experimentally. This discovery is the key to unlocking bone weaknesses, because by understanding the bone's structural function the bone deterioration problem associated with old age can be solved.