Assertion: heart's wall | /r/CapableOf | hold the sac
Facets:
value: together
type: MANNER
Source sentences:
text: Even an organ as apparently simple as the gallbladder contains different types of cells, such as those that form a lining resistant to the irritative effects of bile, muscle cells that contract to expel bile, and cells that form the fibrous outer wall holding the sac together.