Uhm, where are his deltoids? They seem to just be fused with the trapezius? Also, the pectoralis majoris doesn't have that weird crease/seam you're showing, not even on really ripped dudes. It should attach to the clavicle on either side and there should be a gap in the middle along the line of the sternum. On the sides, the pec muscle is basically flush with the deltoid, it doesn't bulge out like that.
Also, what is up with his abs? The top portion is doings some weird stuff, what's that bulging above it?
I highly suggest you go back to your anatomy reference and examine it more critically. If this is going to be graded on anatomy, it's severely lacking at the moment. I'd bring down the subdivision level a couple notches and re-block out the major muscle groups.