On the other hand, the inorganic component of the extracellular matrix of the bone gives our bone the ability to resist compressive strength, compressive force, and it gives the bone compressive strength. And that's because in our inorganic component of the extracellular matrix, we have crystals known as hydroxyapatite. And hydroxyapatite crystals themselves consist of calcium of phosphate as well as hydroxide ions. So the collagen gives the bone tensile strength, but it's the hydroxy appetite of the extracellular matrix that gives the bone compressive strength. So now let's discuss the different types of cells found inside our bone. So we have osteoblasts, we have osteocides, and we also have osteoclasts.