The Circuit Courts of Appeals are intermediate federal courts in the United States that review decisions made by lower courts, such as District Courts. They are organized into 13 circuits, each covering a specific geographic area. These courts primarily handle appeals on legal issues, ensuring that the law is applied consistently across different cases. Each Circuit Court of Appeals consists of a panel of judges who evaluate the arguments presented by both sides. Their decisions can affirm, reverse, or remand cases back to lower courts. The rulings made by these courts can significantly impact the interpretation of federal law.