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.
Thus, the U.S. federal government is not required to have a balanced budget. However, with the one important exception found in Article 1, Section 8. Clause 1. grants Congress the power ...to pay the debts... which is the first thing that must take place in order to have a Balanced Budget.