The U.S. federal court system is a structured network of courts established by the Constitution to handle cases involving federal laws, disputes between states, and other specific matters. It consists of three main levels: the U.S. District Courts, which are the trial courts; the U.S. Courts of Appeals, which review decisions from the district courts; and the U.S. Supreme Court, the highest court that oversees the entire system. Each level serves a distinct purpose, ensuring that justice is administered fairly. Federal judges are appointed by the President and confirmed by the Senate, serving lifetime terms to maintain independence. This system helps uphold the rule of law across the nation.