Anal Segment- The last segment; it is where waste (in the form of pellets) leaves the body. Antennae- Two sensory organs (feelers) located towards the front of the millipede. Each antenna is made of seven jointed segments. Collum- The first segment just behind the head; it protects the rear surface of the head. Labrum- The area just above the mouth. Mandibles- These large, toothed cutting surfaces are used for eating; each mandible is made of two segments. Sternites- The underside of each segment, between the legs, which is relatively unprotected (also called the sternum). When in danger, the millipede curls up, protecting the underside Tergites- The upper portion of each segment (also called the tergum). The tergum is covered with a hard, protective exoskeleton. Trunk- The body of the millipede (excluding the head).