The human body behaves as if it is constructed entirely of spirals. The purpose this series of blog posts is to help the reader see where those spirals are located.
Here is the example image for this blog entry.
The picture shows an unusually large pair of buttocks. The unusually large size of the buttocks is related to the internal body spiral shown in this picture.
A comparison picture is then presented because the spiral lines on the buttocks obscure the view.