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.
A balanced budget most often refers to a budget in which an entity's revenue is equal to its expenditures. Since the state constitution only requires legislators to avoid creating a deficit in the state's budget, they aren't legally required to make the state's revenue equal its expenditures.