Assertion: mediastinum's organ | /r/CapableOf | protrude into coelomic cavity
Facets:
Source sentences:
text: Throughout its length the coelomic cavity is lined by an epithelial sheet, the peritoneum, derived from the splanchnic mesoderm, and any organ or tissue which may appear to protrude into the coelomic cavity does not normally penetrate this sheet but merely invaginates it.