The sclérites are the chitin plates forming the Exosquelette Arthropodes. These parts are called:

• tergites on the back of the animal,
• pleurites on the side of the animal,
• sternites on the ventral part of the animal.

At the Insects, one will say notum rather than tergite , pleuron rather than pleurites and sternum rather than sternites .

These plates are articulated between them. One calls joining the articulation between two sclérites.