Assertion: arthropod's cuticle | /r/MadeOf | chitin
Facets:
value: largely
type: DEGREE
Source sentences:
text: Arthropods have a stiff cuticle made largely of chitin and proteins, forming an exoskeleton that may or may not be further stiffened with calcium carbonate.
text: As arthropods they have: segmented bodies with jointed limbs, all covered in a cuticle made of chitin and proteins; heads that are composed of several segments that fuse during the development of the embryo.
text: The cuticle is made of chitin.
text: Their bodies are protected by an tough cuticle made of proteins and chitin, a polysaccharide with added nitrogen groups.