What is the difference between bone calcium and blood calcium?

The difference between bone calcium and calcium calcium is mainly in the following aspects: First, the form of existence is different, calcium in the blood is mainly in the form of ionic calcium, and calcium in the bone is mainly in the form of calcium carbonate, calcium phosphate and other compounds. Second, the content is different, although the calcium content in the blood seems to be relatively high, but it can be much lower than the calcium in the bone. Bone is the storage warehouse of calcium and phosphorus in the human body. Third, the stability is different, the calcium salt content in the blood will fluctuate greatly with the metabolism of the human body, for example, when the patient has vomiting, diarrhea or a lot of sweating, it may cause the calcium in the blood to show a short-term and large decrease. In addition, if the patient eats high-calcium food, it may also cause a short-term increase in calcium, and the calcium in the bone will change relatively slowly. Fourth, the form of supplement is different, the calcium in the blood can be supplemented by food, in addition, when the calcium in the blood is reduced for a short time, the calcium in the bone can be released to the blood for a short time, and the calcium in the bone can only be gradually deposited into the bone through the calcium salt in the blood.