The mastoid process is located approximately 1 inch posterior to the external opening of the ear.
The hammer (malleus), anvil (incus), and stirrup (stirupus) bones are located in the middle ear (stapes). The eardrum separates your middle ear from your external ear, and the eustachian tube connects it to the back of your nose and throat.
The sternocleidomastoid muscle is a two-headed neck muscle with attachments to the sternum's manubrium (sterno-), the clavicle (-cleido-), and the temporal bone's mastoid process (-mastoid). Neck flexes; head turns.
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