Assertion: brittle star's disc | /r/MadeOf | heart
Facets:
Source sentences:
text: Like the majority of echinoderms the species has five arms that are organised around a central disc which contains all the brittle stars vital organs such as the stomach, heart and the bursae, cilia lined sacs which extract oxygen from the water and expels carbon dioxide and food waste from the body (2).
text: Like the majority of echinoderms the species has five arms that are organised around a central disc which contains all the brittle stars vital organs such as the stomach, heart and the bursae, cilia lined sacs which extract oxygen from the water and expels carbon dioxide and food waste from the body (2).