Final answer:
The semicircular canals are part of the vestibular system for balance, not the auditory system. The cochlea and ossicles are components of the auditory system.
Step-by-step explanation:
The semicircular canals are the structures that are not part of the auditory system. They are involved in the vestibular system, which is responsible for maintaining balance and spatial orientation by detecting rotational movements. On the other hand, the cochlea and the ossicles (which include the malleus, incus, and stapes) are integral to the auditory system. The cochlea transforms sound waves into neural signals, and the ossicles transmit the sound vibrations from the eardrum to the cochlea.