Assertion: arthropod's exoskeleton | /r/HasAspect | seven major classes
Facets:
Source sentences:
text: Body composed of head, thorax and abdomen with three or more pairs of jointed legs; chitinous exoskeleton covering all body parts, molted at intervals; divided into seven major classes: Class Onychophora (walking worms); Class Crustacea (shrimp, crabs & barnacles); Class Insecta (insects); Class Chilopoda (centipedes); Class Diplopoda (millipedes); Class Arachnida (spiders & ticks); and Class Merostomata (horseshoe crabs).