Maybe you should show us some of your anatomy practice, so we can gauge what your general knowledge of anatomy is. It's hard to give critique when all we have is this one little piece. For example, the chest muscles are incorrect, is that because of a lack of anatomical knowledge, if so, why are you unable to find a reference to correct that? Should we assume quite a good knowledge and just tell you how to handle fat tissue to wrap around the muscles and go from there?