Arachnids have a little more parts than insects. Lets start with the legs, did you know spider have twenty knees and eight legs the reason they have so many knees is so they can move in any direction they want. Now lets talk about the spinners the name kinda give it way on what it does but some people might not know the spinners help the spider spin webs to catch food/prey. The chelicerae helps them pinch there pray. Last but not least is the palp helps them move,sense, and feed