Assertion: arthropod's exoskeleton | /r/HasProperty | chitin
Facets:
value: mainly
type: DEGREE
value: partially
type: DEGREE
Source sentences:
text: All arthropods possess a stiff exoskeleton (external skeleton) composed primarily of chitin .
text: The cuticle in arthropods forms a rigid exoskeleton, composed mainly of chitin, which is periodically shed as the animal grows.
text: As is characteristic of all arthropods, black widow spiders have a hard exoskeleton composed of chitin and protein.
text: As mentioned earlier, the crunchy exoskeleton of insects like grasshoppers is partially composed of chitin, a substance not digested by humans.
text: The exoskeleton (cuticle) is a hard covering composed of chitin.