Question

In Crustaeceans the body is divided into two parts -- Cephalothorax and Abdomen and in Insecta the body is divided into -- Head , Thorax and Abdomen . Here, is Cephalothorax same as Head and Thorax ??

Answer 1

Cephalothorax is the part of organism where cephalic region (head) is fused with the thoracic region. In these organisms head and thorax cannot be differentiated separately. Crustaceans like crabs, prawns etc. have cephalothorax.