Question

what do arrows a and b point to? human skull lateral view with arrow a pointing to a large structure posterior to tympanic region and arrow b pointing to an opening on the side of skull. a) petrous process b) internal auditory meatus c) mastoid process b) external auditory meatus d) sphenoid process b) foramen auditory e) mastoid process b) optic canal f) mastoid process b) internal auditory meatus

Explanation:

The mastoid process is a large structure posterior to the tympanic region. The internal auditory meatus is an opening on the side of the skull related to the auditory - vestibular system.

Answer:

E. mastoid process b) internal auditory meatus