It has a nifty tool where by using sliders you can adjust the transparency of various parts of the body. For example if you want to see the circulatory system and the bone structure just slide the away the skin, muscles etc to reveal the structure underneath.
For studying anatomy, it's great. You can see the the various underlying layers of muscle using the slider. There's both male and female figures too. The only downside is that while it's possible to see the figure 360 degrees, you have move your cursor way off the screen just to be able to see certain angles of the body, and this chops the image off in awkward places. Also you can't really adjust the figure's pose either. It's not great for pose reference but it's a handy tool for learning anatomy and it's just fun to play around with too.