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钙是人体骨骼系统发育生长所必需的基本元素,除保持骨骼系统的各种功能外,还参与体内多种生理活动。人体中99％的钙存在于骨骼系统和牙齿。正常时血清钙浓度保持在2.25～2.75毫摩尔/升。血钙主要有三种形式存在:游离钙占钙的总量46.9％,与蛋白质结合钙占39.5％,与非蛋白质阴离子结合钙占13.6％。正常时血清中钙和磷水平处于饱和平衡状态,而
Calcium is a basic element necessary for the development of the human skeletal system. In addition to maintaining the various functions of the skeletal system, calcium is also involved in various physiological activities in the body. 99% of the body’s calcium is found in the skeletal system and teeth. Normal serum calcium concentration remained at 2.25 ~ 2.75 mmol / liter. There are three main forms of blood calcium: free calcium accounts for 46.9% of the total calcium, calcium bound to the protein 39.5%, and non-protein anions with calcium 13.6%. Normal serum calcium and phosphorus levels in a saturated equilibrium, and