Appendages of starfish jointed or not?

The appendages of starfish, also known as sea stars, are not jointed. Instead, they have a radial symmetry and are composed of a series of arms that extend from a central disc. These arms are covered in a tough, flexible skin and contain tube feet, which are used for movement and feeding. The structure of their appendages is quite different from the jointed limbs found in animals like insects or vertebrates.