Never saw the anime, but do really like this picture.

Hey, what an interesting coincidence. I've just stumbled upon Cells at Work (aka Hataraku Saibou / 働く細胞) recently, and it's actually quite entertaining. Entertaining enough that I actually search for more scenes to watch. Also, it's very educational on top of that, the biological metaphors in it are pretty accurate (even doctors say so), and it makes learning fun; at any rate, it's better in terms of getting your attention than a biology class.

I second that. Watch it, it's amazing.

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Probably when its officially dubbed.