Back side Anatomy Quickie

Something really random I decided to do :V been taking a ecorche sculpting class this semester so I've had anatomy on the mind >_>

Let's face it, anatomy is hard. So I decided to make a little simplification of it for the back view by breaking each part into simpler shapes. Also included the muscles underneath so that it's easier to understand why the body is shaped in certain ways.

I do not claim to be 100% accurate (some things in here are heavily simplified...) but this is pretty close. 

If you have any questions feel free to ask ^^