Assertion: echinoderm's vascular system | /r/MadeOf | circular passageway
Facets:
Source sentences:
text: The water-vascular system consists of a circular passageway, the ring canal, that surrounds the digestive tract and five radial canals that radiate from the ring canal like spokes of a wheel.
text: The water-vascular system consists of a circular passageway, the ring canal, that surrounds the digestive tract and five radial canals that radiate from the ring canal like spokes of a wheel.