The body has been poisoned!

The poison is currently in Mr. Artery. All the other blood vessels crowd around and watch him. He seems to be struggling with a dark fluid inside him. Mr. Artery loudly announces that the poison must not get to Mr. Vein or else it will get to the heart. Then, he says in an ominous voice, they will all be doomed. The blood vessels watch as the poison sluggishly moves through Mr. Artery. He pushes and strains, and the poison moves even slower. This process lasts half a day, until the poison gets through. If Mr. Artery had hands, he would have thrown them up. It was all in Vein.