So that basically means bones are dense, bones are strong, and bones are hard. So they have the ability to resist both tensile as well as compressive forces. The question is why? What exactly is found inside the bone that gives bone these types of properties? So basically, it's the extra, extracellular matrix that is found surrounding our cells and in between our cells that actually gives the bone these types of properties. So, before we discuss the different types of cells inside the bone and the structure of the bone, let's discuss the extracellular matrix of the bone.