But if the blood level of calcium is low, then if the calcium level in the blood is low, that basically means the bone can actually release calcium into the blood and then the calcium can go to the cell that requires that calcium. So remember, calcium is important. For example, in muscle contraction. And if our muscle cells are low in calcium, the bone can basically release calcium to the blood that will eventually travel to those muscle cells. So bone is responsible for storing important minerals such as calcium. It also contains adipose tissue that is responsible for storing triglycerides.