The players are divided into two sides and toss up to decide which should begin. The beginning side tosses a ball to anyone on the opposite side, saying the name of some artery as he does so. The one to whom the ball is thrown immediately calls out where the artery is situated before the thrower can count ten. Should he fail to do this, he must cross over to the opposite side. The side wins which has most players at the end of a given time. The name of an artery is only given as an example. It might be required, for instance, that upon giving the name of any fracture, the requisite number of bandages should be called out, or anything else of the kind.