Which part of the Venus flytrap plant traps insects?

The part of the Venus flytrap plant that traps insects is the leaves. Specifically, it is the modified leaves that form a structure called a "trap". These traps have two lobes with sensitive trigger hairs that, when stimulated by an insect or other small prey, causing the trap to close rapidly, trapping the prey inside. The Venus flytrap uses this carnivorous adaptation to supplement its nutrient intake, as it grows in nutrient-poor soil.