These cells are capable of producing the protein collagen and releasing secreting this collagen into the extracellular matrix, where the organic component of the matrix consists predominantly of this protein collagen. Now, on the other hand, these osteoblasts are also capable of creating the inorganic component of the matrix. They can basically absorb the calcium as well as phosphate from the blood and deposit these ions onto the matrix in the form of crystals known as hydroxyapatite. So remember, hydroxyapatite is the inorganic component of our matrix. It consists of calcium phosphate and hydroxide. So it's the collagen that gives our bone the ability to resist ten style forces.