Bone structure can vary depending on the type of bone, but there are some generalizations. Bones consist of three different kinds of cells. Vertebrate bones are composed of a substance called hydroxyapatite, which is made of calcium phosphate.
Balanced generally is positive terminology for a government that equally represents all the interests and parties of a nation in its government. Divided government is the negative form where these interests clash and nothing gets done in government because the parties have equal power and never agree.
The set of rules that the U.S. federal government is bound by to make sure that no one branch of the government becomes too powerful is called the system of checks and balances. In other words, each branch of the government is 'balanced' because each branch has its own set of authoritative functions and responsibilities.