That all looks great, the anatomy in general all looks well done, although there's a lot of disembodied heads (which is what i tend to do because drawing a full bodies in some kind of fancy pose is a bit of a pain). Those light lines, it might be the scanner drowning out the lineart, I know mines a piece of trash and doesn't do it's job all that well.
Oh, tsk tsk, someone's been doodling on their homework I see.
Oh, tsk tsk, someone's been doodling on their homework I see.