The liver is the largest organ of the human body and it has many - very many - important functions. The most important has to do with the digestive system, but this is by no means all. It clears the body of infections including bacteria.
It neutralizes and destroys toxins. It is the body's means of storing important nutrients, minerals such as iron. However, one of the functions of the liver is NOT to store calcium. Calcium is stored in the bones.