What ideas of government did the US borrow from ancient Greece and ancient rome?

Among many things some of the more important concepts borrowed by the USA from ancient Greece and ancient Rome were the rights of citizens to vote; to have people accused of a crime be entitled to a jury trial. In ancient Athens for a good period of time, there existed a "democracy" From Rome, the idea of written laws. In addition Rome also had a system for citizens to vote. These essentials for a representative government were lost for ages. The USA placed these basics in US laws. In the era that the USA was formed, few nations had these basic rights in law.