Assertion: inner ear's saccule | /r/AtLocation | the vestibule
Facets:
Source sentences:
text: The saccule and utricle are two membranous sacs located in the vestibule.
text: The saccule and utricle are located in the vestibule and contain cells that sense movement of the head in a straight line, that is, back and forth, sensing acceleration, or up and down, sensing gravity.