This is a hip website, so why not use a "hip" logo?
Actually, I got the idea for the logo from the "hip T-shirt" that my friend Pamela Langley used for the conference shirt at the Human Anatomy and Physiology Society (HAPS) Annual Conference that she organized in 1994.
It's a good icon for this website because the hip is an important structure with an important function and typifies the concept that form and function are intertwined. And the hip can move in many different directions—just like this website!
The hip logo is my original design and creation, based partly on the medical image at http://en.wikipedia.org/wiki/Image:Hueftgelenk-gesund.jpg
The hip logo for The A&P Professor website, blog, and services is a trade mark of Kevin Patton, Lion Den Inc. (trademark and copyright holder).