Assertion: arthropod | /r/HasProperty | open circulatory system
Facets:
Source sentences:
text: Insects have the traits already discussed for the arthropods and the mandibulates - exoskeleton (of chitin, a light material but very supportive if a structure is small enough - in some ways like fiberglass), open circulatory system, segmented worm-type nervous system, mandibles, antennae - and a few specific traits of their own.