Nervous System Notes 12: Ear Anatomy

The three major regions of the ear are:

The external and middle are used for ________ only, while the internal is used for _________.

The pinna or ________ is the external shell shaped structure we commonly refer to as the ear.

This collects sounds and directs it down the _________.

The external acoustic meatus or ________ is a 1 in long opening in the skull, covered by skin, that features ________ glands (release ear wax or cerumen).

Sound that enters the auditory canal eventually hits the ________ membrane or eardrum.

The ________ cavity, which is an ___filled, mucus lined tube that runs from the ear drum to a _________.

This bony wall has two openings, the ________ and the ________.

The ________ runs from the tympanic down to the throat and links the two.

The tympanic cavity is lined by three bones that pass the vibration of the sound along to the inner ear. These bones are named for their shapes, and are the ______, the _____, and the ________.