Been a bit busy this week, as usual... been hard keeping track on what should done and whatnot. Monday was my busy day; classes and figure drawing, along with studying for a test the next day. Tuesday, I spent the day with my dad, and the rest of the night working on a computer animation.
For Wednesday, I got a chance in the evening to work a little in my anatomy book, and did the back muscles of the torso:
Afterwards, I added in another torso drawing for my anatomy book, the rib cage and pelvis; this is a copy from Hale's Drawing Lessons from the Great Masters: