<prompt> The bone matrix has the following crystals ?Calcium hydroxyapatiteCalcium pyrophosphateCalcium phosphateCalcium sulphate  <response>: Ans. is a i.e., Calcium hydroxyapatite Structure of bone Bone is a specialized connective tissue. o Bone components are :? Inorganic elements 65 Organic matrix 35 1. Inorganic elements It is the mineral phase, principally composed of calcium and phosphate, mostly in the form of hydroxyapatite. 