Assertion: bursa | /r/HasProperty | thin sac of tissue
Facets:
Source sentences:
text: A bursa is a thin sac of tissue that contains a bit of fluid to lubricate the area where the friction occurs.
text: A bursa is a thin sac of tissue that contains a bit of fluid to lubricate the area where the friction occurs.
text: A bursa is a thin sac of tissue that contains fluid to lubricate the area and reduce friction.