Part of these structures present in all vertebrates is derived from the neuromasts that make up the lateral lines. (-5[1])In amniotes, that part of these structures is the only thing to develop from the dorsolateral placode. Parts of these structures develop from the first and second pharyngeal pouches. The Rinne (15[1])and Weber tests can determine whether certain defects in these structures are (*) conductive or neurological. (10[2])In these structures, (10[1])endolymph (10[1])and perilymph (-5[1])are contained (10[1])in the membranous and bony labyrinths. (10[2]-5[1])Those parts (10[1])of these (10[1])structures (10[1])contain the semicircular canals, (10[4]-5[1])which are essential for maintaining (10[3])balance. (10[4])In these organs, (10[1])the eighth cranial nerve (10[1])is connected to hair cells that respond to (-5[1])different frequencies of vibrations. For 10 points, name this organ containing the cochlea that is used for hearing. (10[3])■END■ (10[2])