part_of
part of
part of
has part
has part
has_part
surrounded by
surrounded by
pericardial cavity
serous pericardium
fibrous pericardium
pericardial sac
http://upload.wikimedia.org/wikipedia/commons/7/7e/Gray489.png
RETIRED_EHDAA2:0001443
FMA:9868
pericardium
uberon
SCTID:361326002
TAO:0000054
UBERON:0002406
A double-walled sac containing the heart and the roots of the great vessels.
pericardium
thoracic segment organ
serous sac