Assertion: echinoderm's vascular system | /r/HasProperty | linked by a nerve ring
Facets:
value: ambulacrum
type: OTHER
Source sentences:
text: Here a diagram of an asteroid with cutaways to show internal anatomy illustrates the major features, including the mesoderm-derived water vascular system, a hydraulic system that drives the distinctive tube feet used for feeding and locomotion, five radial nerves that run along each arm/ambulacrum linked by a nerve ring, and the mesoderm-derived skeleton.