Sacculus and utriculus
Membranous sacs filled with endolymph, part of inner ear
Macula
A receptor in the utriculus and sacculus that detects the position of the head in space with respect to gravity
Ampulla
A widened part at the base of s semicircular canal, containing a christa
Crista
A receptor in the semicircular canals that detects changes in the speed or movement of the head
Cupula
A jelly-like cap that forms part of the crista