What animal has 3 body sections and an exoskeleton?

- Crab

- Lobster

- Yabby

- Marron

Most crustaceans have exoskeletons that cover bodies divided into segments.

The arthropod body is encased in a hard structure called an exoskeleton. The exoskeleton acts as an external skeleton and provides the animal with structural support and protection. The exoskeleton consists of cuticle, a multi-layered substance secreted by the epidermis. Cuticle consists of chitin, proteins and lipids. In many aquatic crustaceans, the exoskeleton is mineralized with calcium carbonate that is acquired from the surrounding water. This produces a tougher, more rigid structure. Since the exoskeleton is rigid, it must be jointed to allow the arthropod to move and acts as a framework to which the animal's muscles are attached.