Imagine an alternative reality in which Frank Netter dropped out of medical school and became a tattoo artist.
If that had happened, there would be some choice tattoos out there -- much better than that skull on the dude on the left margin. I'll bet Netter's work would look a lot like some of the specimens posted on the excellent Street Anatomy site. Check out the original Anatomy Tattoos there, with some recent additions.
I especially liked the black light tattoo -- to me it looks a lot like just another day at work.