What type of remains cannot be mixed in the same retort as human remains?

The type of remains that cannot be mixed in the same retort as human remains is animal remains. This distinction is important due to the legal, ethical, and procedural standards in the mortuary and cremation practices.

Cremation processes are specifically designed to handle human remains, and mixing animal remains with human remains can complicate identification, create ethical dilemmas, and potentially violate regulations regarding the treatment of the deceased. Each type of remains—human and animal—may also have differing combustion properties and produce different emissions, which can affect the operation of cremation equipment.

In contrast, anatomical parts are often treated under specific guidelines within the mortuary field, particularly in educational or research settings, and may have their own designated processes. Organic materials typically refer to biodegradable substances, which may or may not relate directly to human remains. Therefore, the focus on animal remains highlights the need for separation in ensuring respect for the deceased and adherence to applicable laws and practices in mortuary operations.