Google Body Interactive and full of features, this anatomy app is the high-quality you'd expect from Google. What you might not expect is that it's not available on all Android devices. Go figure.
Visual Anatomy So if you can't get Google Body, get this as a great anatomy reference. You pay a little for the content...
Visual Anatomy Free ... or you can get the freebie, with a little less content but similar features. Both are tablet ready and feature things like tap-and-zoom on high-res images, and quizzes to test what you've learned.