Assertion: echinoderm | /r/HasAspect | internal skeletons
Facets:
Source sentences:
text: Even though they’re invertebrates, echinoderms have internal skeletons just like we do.
text: Echinoderms have an internal skeleton made up of an arrangement of ossicles (plates made mostly of calcium carbonate), connected by a special kind of connective tissue called 'catch connective tissue' or 'mutable collagen' or 'mutable connective tissue'.
text: Echinoderms have internal skeletons and not externals ones like arthropods.