Assertion: echinoderm's feature | /r/HasProperty | their water vascular system
Facets:
Source sentences:
text: A unique feature of all echinoderms is their water vascular system; these interconnected tubes allow them to move, feed and exchange gases (respiration).
text: The morphological features that unite all echinoderms are the water vascular system and a mesodermal skeleton comprised of numerous plates.
text: A unique feature of echinoderms is their water vascular system.
text: A unique feature of echinoderms is their water vascular system.