Regular bones are also structure with non-uniform porosity. But to optimize something like strength-to-weight ratio by reinforcing areas under the most stress.

Regular bones are also structure with non-uniform porosity. But to optimize something like strength-to-weight ratio by reinforcing areas under the most stress. http://classes.mst.edu/civeng120/lessons/composite/materials/examples/human_body.html http://classes.mst.edu/civeng120/lessons/composite/materials...