Hi there! Let me tell you about the saguaro cactus and its special skin.
The skin of a saguaro cactus looks ruffled, like little wrinkles. These wrinkles are very important! When it rains, the cactus fills up with water through its roots. The ruffled skin can stretch out to hold lots and lots of water, kind of like a big water balloon.
Then, when the weather is dry and hot, and there is no rain, the cactus uses the water it saved in its skin to stay alive. The ruffles help the cactus hold onto the water without losing it quickly.
So, those wrinkles on the cactus are like a built-in water tank that stretches when it's full and keeps water safe during dry times. Pretty cool, right?