The members of the legislative branch are the house of representatives and the senate. There are 435 representatives and 100 senators. The primary functions are the make the laws and has the power to declare war.
Writes laws
Lets write some laws 
The members of the executive branch are the president and the vice president. The main function of the executive branch is to enforce the laws.
veto or reject laws
No gonna happen buddy boy
So what do you think of our new law
The judicial branch is made up of 9 judges called the supreme court. The judicial branch resolves arguments about laws and interprets the laws.