Leopard gecko
Like many lizards, the leopard gecko has a tail that breaks off when grabbed by a predator. The tail breaks at a crack in the vertebra, and the surrounding muscles are arranged so that they separate neatly and instantly. A muscle closes around the artery in the tail at the point of the break and stops blood loss. Normally a new tail grows back. This method helps the leopard gecko to escape when attacked. Leopard geckos also have teeth and they are born with about 100 teeth.