I'm enjoying these - very useful ;)

Glad you like them!

I am enjoying these as well. I often find "anatomical" drawings interesting because we often used models of actual skulls and such to make animal masks and costumes when I was in school. It helped to visualize the movement and construction when you had a feeling for the underlying mechanics instead of a static shape that had the same consistency throughout (which results in a more "cartoony" look). A nice resource to have.