Why Is The Crayfish Classified As A Segmented Animal

The segmented worms are classified in the phylum pogonophora.

Why is the crayfish classified as a segmented animal. They are still considered segmented because their fused segments are still segments. The crayfish is classified as an. Crayfish inflexible cephalothorax crayfish classified segmented animal wh. The major function of the exoskeleton of a crayfish is to protect its soft body.

The head has a sharp snout and the compound eyes are on movable stalks. The body is separated into the head thorax and abdominal regions. These is no formal classification for segmented animals because segmentation has evolved independently in chordates and arthropods. What is the major function of the exoskeleton of a crayfish and how is the exoskeleton an adaptive to the crayfish.

The exoskeleton or body covering is thin but tough. Some segmented animals have some of those segments fused. Although the crayfish had an inflexible cephalothorax it is classified as a segmented animal because it abdomen and tail is segmented and the cephalothorax is segmented underneath. Crayfish are classified as arthropods because of their characteristic segmented bodies chitinous exoskeleton and joint appendages.

The common ancestor of arthropods and chordates is not segmented. Although the crayfish has an inflexible cephalothorax the crayfish is classified as a segmented animal. A crayfish has segments which are sections of a body that are separated by a crease so it might be determined as segmented because it has only two so it may be classified but it might not. Crayfish are considered arthropods because they have an exoskeleton and segmented body parts.

Crayfish are characterized by a joined head and thorax or midsection and a segmented body which is sandy yellow green red or dark brown in colour. Similarly chordates are defined by the notochord. Although the crayfish has an inflexible cephalothorax the crayfish is classified as a segmented animal.