The Senado is the upper chamber of the legislative branch in many countries, including Spain and Mexico. It plays a crucial role in the law-making process, reviewing and approving legislation proposed by the lower house. Senators often represent specific regions or states, ensuring that diverse interests are considered in national governance. In the United States, the Senate consists of two senators from each state, regardless of population size. This structure aims to balance the influence of populous states with less populated ones. Senators serve longer terms than members of the lower house, allowing for more stability in legislative decisions.