血液中钙的含量不到人体总钙的0.1%,其平均浓度约为2.25～2.75mmol/1,(相当于每100ml 血中含钙9～11mg)其中游离钙和结合钙各约占一半,真正具有 The blood calcium content of less than 0.1% of the total body calcium, the average concentration of about 2.25 ~ 2.75mmol / 1, (equivalent to every 100ml of blood calcium 9 ~ 11mg) of which calcium and calcium combined accounted for about half, Really have