Okay, this isn't the circulatory system - this is the scene ten minutes after I realised we'd run out of milk. I
really didn't want to go out again and as I'd had a long day at a first-aid refresher course, which leads me to.. (ta-daaah!):
The Circulatory System!
No, it wasn't by me. We'd divided into two groups to do some stuff. The other group produced this diagram of the circulatory system, apparently of a troll. This is revenge for the way everyone laughed at my diagram of the respiratory system and its cauliflower lungs - alas it had already been rubbed off before I remembered that I had my camera with me or you would see that it was clearly a Work of Genius.