Stretching and compressing bones?

Question

The Young's modulus of elasticity when a bone is stretched is : 16*10⁹ and when it is compressed, it is 9*10⁹ N/m². That means, change in length will be more if you compress a bone as compared to stretching it. What is the biomechanical reason behind this ?

Answer 1

Because the load to deformation ratio is higher in the larger change, ie, compression.