Final answer:
Congress has created a total of thirteen U.S. Courts of Appeals, serving as intermediate appellate courts in the federal judicial system and reviewing decisions from the 94 federal District Courts.
Step-by-step explanation:
Congress has established thirteen U.S. Courts of Appeals under its constitutional authorization. There are eleven regional circuits across the United States and two additional circuits in Washington, DC: the D.C. Circuit and the Federal Circuit. Unlike District Courts, which primarily conduct trials, the Courts of Appeals generally do not hold trials. Instead, these courts review the decisions of trial courts that fall within their respective jurisdictions.
Each Court of Appeals is overseen by a panel of three judges, and their decisions are subject to further review by the U.S. Supreme Court. These appellate courts play a critical intermediate role in the federal judiciary system, reviewing the rulings from 94 federal District Courts, including special jurisdictions like bankruptcy and immigration courts.