Drawing The Skull, Musculature, and Planes of the Head

As we wrap up our head drawing section for my Drawing for Animation course, I am posting some images which I hope will be valuable to my students and to anyone who may be interested.

To begin, a turn-around including the front, three quarter, and side of the head broken down with skeletal, musculature, and planes.
Followed with lighting examples.Give these a shot, I'll post more if you ask for it. Have fun drawing. Oh yeah, the muscle names will be on the test, folks. Crack open that book of yours and start labeling.