It depends on the setup of your state's judicial system. In some states, cases heard by a magistrate or other lower court can be appealed to a court of common pleas, or "general trial court"....
The trial court of general jurisdiction in Missouri is the circuit court. This means that circuit courts can hear cases on civil and criminal matters that arise in the State of Missouri regardless of...
Generally, cases are first heard in whatever trial court has original jurisdiction over the case depending on the laws, territory and/or special subject-matter involved.
In a case before the Supreme Court, the law itself is on trial and the justices determine whether the law is guilty of violating the Constitution, which is the supreme law of the land.