Assemblies and Senate
Assembilies
The Roman Assemblies were instiutions of ancient rome.They were the Roman legislative branch and passed all of the legislaton. Since the assemblies operated on the basics of democracy ordinary citizens would cast all of the votes.
Senate
The roman senate was a political institution in ancient rome it was one of the most enduring insitutions being founded in the first days of rome. The roman senate was made of 300 people.
Image source
http://www.empirerome.com/government/ancient-roman-republic-government/
Text book prologue to the present page 198-199