How many body segments do arachnids have?

Arachnids have two main body segments: the cephalothorax and the abdomen. The cephalothorax, which is a fused head and thorax, bears the eyes, mouthparts, and legs, while the abdomen contains the reproductive organs and digestive system. This segmented structure distinguishes them from insects, which possess three body segments (head, thorax, and abdomen). Understanding the anatomy of arachnids is essential for pest control operators, as it helps identify and differentiate between various pests and understand their behaviors and habitats.