Answer:
Parts of the medieval court system that we still use today in America's court system is a Judge and a Jury.
Step-by-step explanation:
The judiciary in the United States is organized differently in the federal and state areas. Federal judges are not chosen by election, but only by appointment of the President of the Republic with the participation of the Federal Senate and the National Bar Association. The existence of judges is something that has existed since medieval times.
In addition, in the US, civil or criminal cases are submitted to jurors through the jury, chaired by a judge. This is also a characteristic that has prevailed since medieval times.