Assertion: vertebrate's skeleton | /r/HasProperty | endoskeleton
Facets:
Source sentences:
text: Vertebrates (Subphylum Vertebrata) are animals that possess an internal skeleton (endoskeleton) that includes a backbone made up of a column of vertebrae (Keeton, 1986:1150).
text: Echinoderms are armoured animals that have a hard internal skeleton (endoskeleton) made up of plates and spines.