The constitution establishes three branches of government that
share identical powers.
have different powers.
are led by the legislative branch.
are led by the judicial branch.

The three branches of government have different powers. The legislative branch, which would include the Senate and other law making bodies, have the power to make laws and pass laws that the people will obey. The administrative branch is in charge of implementing those laws as well as implementing projects for the betterment of the country. They are basically the branch that does the execution of things. Last, the judicial branch is the one that provides justice based on the law. They have the last say when it comes to judging what is right and wrong under the law. 

The three branches of government each have different powers that are established in the first three articles of the constitution, with article 1 about the legislative, article 2 about the executive, and article 3 about the judicial branch.