Insects actually have legs that are divided into several segments, not just three parts. Each insect leg typically consists of the following segments:

1. Coxa: This is the segment that attaches the leg to the insect's body.
2. Trochanter: A small segment that acts as a connector between the coxa and the femur.
3. Femur: The largest segment of the leg, which provides strength and support.
4. Tibia: A long segment that follows the femur, often involved in movement.
5. Tarsus: The final segment, which is subdivided into smaller sections called tarsomeres. It ends with claws or pads that help the insect grip surfaces.

So, while the legs are not divided into just three parts, they are composed of multiple segments that work together to allow insects to move efficiently. This segmentation is a key feature of arthropods, the group to which insects belong.