SEARCH Articles Figures Tables Apatite, biological Calcium hydroxyapatite Biological calcium hydroxyapatit Biological calcium phosphate Calcium biological coordination chemistry Calcium biological distribution Calcium biological function Calcium biological importance Calcium biological roles Calcium biological significance Calcium biological systems Calcium biological variability Calcium biologically active chelates Calcium carbonate biological precipitation Calcium complexes biology Calcium deposition biology Calcium in biological fluids Calcium ions biology Calcium, in biology Membranes, biological calcium role