Assertion: sea urchin | /r/HasAspect | a hemal system
Facets:
Source sentences:
text: Sea urchins possess a hemal system with a complex network of vessels in the mesenteries around the gut, but little is known of the functioning of this system.
text: Sea urchins possess a hemal system with a complex network of vessels in the mesenteries around the gut, but little is known of the functioning of this system.
text: Sea urchins possess both a water vascular system and a hemal system, the latter containing blood.