Final answer:
The vestibular apparatus consists of the semicircular ducts, saccule, and utricle, which detect acceleration and head position to help maintain balance.
Step-by-step explanation:
The components of the vestibular apparatus include the semicircular ducts, saccule, and utricle, but not the cochlea or the spiral organ, which are associated with the auditory system. The utricle and saccule are responsible for detecting linear accelerations and head position relative to gravity, while the semicircular ducts perceive rotational movements. These structures are filled with fluid and contain hair cells with stereocilia that are bent by the movement of fluid or shifting of crystals, sending signals to the brain to help maintain balance and spatial orientation.
The components of the vestibular apparatus include the semicircular ducts, saccule, utricle, cochlea, and spiral organ. The semicircular ducts are three ring-like extensions that are oriented in different planes and detect rotational movements. The saccule and utricle are responsible for measuring head orientation and respond to acceleration in a straight line, such as gravity. The cochlea and spiral organ are part of the auditory system and not directly involved in the vestibular sense.