Which two body divisions do arachnids possess?

Which two body divisions do arachnids possess?

• A. Head and Thorax
• B. Cephalothorax and Abdomen
• C. Thorax and Abdomen
• D. Head and Abdomen

Answer: (B)

Arachnids, which include spiders, scorpions, ticks, and mites, are characterized by having two main body divisions: the cephalothorax and the abdomen. The cephalothorax is a fusion of the head and thorax, serving as the primary body portion that contains the mouthparts, eyes, and legs. The abdomen houses the digestive and reproductive organs. This distinct structural arrangement is key to identifying arachnids and differentiating them from other arthropods, such as insects, which possess a head, thorax, and abdomen as separate body segments. Understanding these anatomical features is important for recognizing the biology and ecology of arachnids in pest control and other contexts.

Arachnids, which include spiders, scorpions, ticks, and mites, are characterized by having two main body divisions: the cephalothorax and the abdomen. The cephalothorax is a fusion of the head and thorax, serving as the primary body portion that contains the mouthparts, eyes, and legs. The abdomen houses the digestive and reproductive organs. This distinct structural arrangement is key to identifying arachnids and differentiating them from other arthropods, such as insects, which possess a head, thorax, and abdomen as separate body segments. Understanding these anatomical features is important for recognizing the biology and ecology of arachnids in pest control and other contexts.