Mich. Comp. Laws § 339.1805
An individual licensed to engage in the practice of mortuary science under this article may disinfect or preserve a dead human body, entirely or in part, by the use of a chemical substance, fluid, or gas in the body or by the introduction of a chemical, substance, fluid, or gas into the body by a vascular or hypodermic injection, or by direct application into an organ or cavity in preparation for burial or disposal. The individual licensed to engage in the practice of mortuary science may direct the burial or disposal of a dead human body and may maintain a funeral establishment for the preparation and disposition, or for the care of a dead human body and may, in connection with the individual's name or the name of the funeral establishment use the words "funeral director", "undertaker", "mortician", "mortuary science", or a word of similar meaning as approved by the department.
MCL 339.1805