How are the thorax and cephalothorax of arthropods related to segmentation?

Arthropods are distinguished from other animals by segmentation, meaning their bodies are divided into distinct parts. Insects have three body regions: head, thorax, abdomen. Arachnids have just two body regions: cephalothorax, abdomen.Elexus M. Sandoval. <3 Date Of: 2/10/11Vista Academy!!