The cephalothorax is a body region found in certain arthropods, including spiders, crabs, and insects. It is a fused structure that combines the head and thorax, serving as a central part of the organism's anatomy. This region typically houses important organs such as the eyes, mouthparts, and legs. In arachnids, the cephalothorax is often covered by a hard shell called the carapace. This protective feature helps shield vital organs and provides structural support. The cephalothorax plays a crucial role in the movement and feeding of these animals, allowing them to interact effectively with their environment.