Critique on Figure Drawing

All critique is welcomed. Thank to all that comment and make suggestions, I appreciate it.

Any suggestions on how to improve arm anatomy?

Your deltoid[muscle connecting the arm to the shoulder] isn't going far enough into the upper arm. You've got good foreshortened arm at the top. Your torso seems disconnected from the pelvis. You've got great line variation I would suggest exaggerating your line variations especially in points of connection [Example: Where the thigh meets the stomach]