Assertion: pericardium's heart | /r/HasProperty | separated by tough membrane
Facets:
value: from the other mediastinal structures
type: OTHER
value: within the mediastinum
type: LOCATION
Source sentences:
text: Within the mediastinum, the heart is separated from the other mediastinal structures by a tough membrane known as the pericardium, or pericardial sac, and sits in its own space called the pericardial cavity.