Checks and Balances
Checks and balances is the system that was created when the constitution was written. The formation of the three branches of the government was created so that the powers of the central government were separated instead of having one person or group having all of the power. The "checks and balances" system gives each branch of the Federal Government a way to check, or control, the other two branches.
As you can see from the diagram above each branch has a way to insure that another branch can't do everything. Each Branch relies on another branch, and it goes in a circle, or in this case a triangle.