Assertion: endocardium's layer | /r/HasProperty | layer
Facets:
Source sentences:
text: Pericardium: 3 layers (double-walled sac) -3 layers (superficial to deep): 1. fibrous pericardium 2. serous pericardium (2 layers)
text: Serous pericardium: 2 layers -thin, slippery serous membrane that forms closed sac around the heart -2 layers: 1.