13 Human Systems
I first learned of the systems of the body through Machaelle Small Wright of Pearlandria, in Warrenton, Virginia.
https://www.perelandra-ltd.com/
She had “Microbial Balancing Solutions” for 12 systems of the body and the cells.
Over the years, I have dropped the cells as a system and added the Excretory System to make 13 body systems, that correspond to my Power Animals.