Mich. Comp. Laws § 600.151: Judicial power of state; vesting in courts.

Sec. 151.

The judicial power of the state is vested exclusively in 1 court of justice which shall be divided into 1 supreme court, 1 court of appeals, 1 trial court of general jurisdiction known as the circuit court, 1 probate court, and courts of limited jurisdiction created by the legislature.