Assertion: echinoderm's tube foot | /r/HasProperty | extended
Facets:
Source sentences:
text: The water vascular system assists with the distribution of nutrients throughout the animal's body and is most obviously expressed in the tube feet which can be extended or contracted by the redistribution of fluid between the foot and the internal sac.
text: The tube feet poke through holes in the skeleton and can be extended or contracted.
text: Tube feet are extended