Are you familiar with cactus? These are special plants which live in the deserts of North and Central America. The structure of their body enables them to survive the dry, the waterless, and rough condition of the desserts. They have large, thick stems that have spines or scales instead of leaves. Since cacti ( plural for cactus) do not have leaves, they do not lose much water through transpiration. And as most cacti are spiny, they could not be easily eaten by hungry9 and thirsty) desert animals. Also, the stems of most cacti are wrinkled or furrowed which allows them to expand with stored water after a rainstorm.