Assertion: echinoderm's tube foot | /r/ObjectUse | used for feeding
Facets:
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.