Assertion: arachnid's structure | /r/CapableOf | call endosternite
Facets:
Source sentences:
text: Arachnids also have an internal structure called an endosternite that is composed of a cartilage-like material and provides a structure for muscle attachment.
text: While the exoskeleton provides both support and protection, arachnids also have a hard internal structure called the endosternite, which anchors muscles.