.......and the blue pictures are deoxygenated blood cells on thier merry way back to the lungs. So what I did was make two collages of the red and blue cells, then cut them up and turned them into 2 sets of 5 postcards so that oxygen was sent in the post. On the back of the red postcards I wrote letters to 5 different muscles telling them what to do with the oxygen. Then I had people at uni write the replies on the back of the blue postcards saying thankyou and returning the deoxygenated blood cells back to me (the lungs)
It's a bit hard to explain now, I hope somebody understands what i'm attempting to say lol.