What are the two organs located in the inner ear?

The inner ear is primarily responsible for two key functions: hearing and balance. The cochlea plays a vital role in the auditory system, converting sound vibrations into neural signals that can be interpreted by the brain. Meanwhile, the vestibular apparatus is crucial for maintaining balance and spatial orientation, as it detects changes in head position and motion.

In this context, both the cochlea and the vestibular apparatus are part of the inner ear, which distinctly separates them from the other options. The semicircular canals, which are included in the first choice, are part of the vestibular apparatus but do not encompass the complete balance function. The oval window and the organ of Corti, while important, represent components or features of the cochlea rather than distinct organs of the inner ear. Lastly, the ear drum and ossicles are part of the middle ear and do not refer to structures found in the inner ear at all. Thus, choosing the cochlea and vestibular apparatus as the two organs of the inner ear is accurate and reflects their important roles in hearing and balance.