Bruce Lyons has a clear description of the links between these geometrical forms, and human forms.
“The 2:1 is the ultimate mediator between inner and outer; small and large; top/bottom; back/front, above/below. It’s like a generator. From it all sorts of functional geometrical forms are being constructed. Instinctively I started to search for where in our anatomy a process might manifest itself through a form as fundamental as this Vesica Piscis.”