Assertion: bursa | /r/MadeOf | a bit of fluid
Facets:
value: to lubricate the area
type: PURPOSE
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.