What kind of defense strategy does posion ivy plant have?

Since poison ivy is a plant its only defence is that when any thing touches it, it gives off poison onto your skin which looks like a red blotch on your skin. If you ever get poison ivy don't itch it that just makes it worse and once you touch it and you touch some were else on your skin it spreads. To treat it, use itch cream and if that doesn't work, talk to your pharmacist!!!