Assertion: sea urchin's organ | /r/HasProperty | enclosed in hard shell
Facets:
Source sentences:
text: The internal organs are enclosed in a hard shell or test composed of fused plates of calcium carbonate covered by a thin dermis and epidermis.
text: The internal organs are enclosed in a hard shell or test composed of fused plates of calcium carbonate covered by a thin dermis and epidermis.
text: The internal organs are enclosed in a hard shell or "test" composed of fused plates of calcium carbonate covered by a thin dermis and epidermis.