structures of the ear.

Question 1

The ear consists of three anatomical subdivisions:

Answer 1

external (outer) ear,
middle ear,
internal (inner) ear.

Question 2

_______ is designed to collect and direct sound waves. It is comprised of the auricle, external auditory canal, and the tympanic membrane (eardrum).

Answer 2

The external ear

Question 3

What part of the external ear?
_______ is the external aspect of the ear that collects sound waves and directs them toward the auditory canal

Answer 3

Auricle

Question 4

What part of the external ear?
A curved tube that extends from the outside and directs sound waves towards the eardrum. It contains a few hairs and glands which secrete
cerumen (earwax).

Answer 4

External auditory canal

Question 5

What part of the external ear?
The thin, semi- transparent partition between the external auditory canal and middle ear. Sound waves cause the eardrum to vibrate.

Answer 5

Tympanic membrane

Question 6

____ is a small, air-filled cavity between the eardrum and the internal ear

Answer 6

Middle ear

Question 7

What are the three tiny bones called auditory ossicles that extend across the middle ear?

Answer 7

1) Malleus
2) Incus
3) Stapes

Question 8

_______ is where all the receptors for hearing and equilibrium are housed. It is divided into two general regions: The outer bony labyrinth and the inner membranous labyrinth.

Answer 8

The internal ear

Question 9

_________ is part of the temporal bone and is divided into the cochlea, vestibule, and semicircular canals and contains a fluid called perilymph, which surrounds the membranous labyrinth.

Answer 9

The bony labyrinth

Question 10

________ is a series of sacs and tubes in the same general shape as the bony labyrinth and contains a fluid called endolymph.

Answer 10

The membranous labyrinth

Question 11

________ constitutes the oval portion of the bony labyrinth. The membranous labyrinth in the vestibule consists of two sacs called the utricle and saccule.

Answer 11

The vestibule

Question 12

Lying anterior to the vestibule is the _______ a spiral bony canal which has the principal organ of hearing, the spiral organ. It rests on the basilar membrane within the cochlear duct.

Answer 12

cochlea,

Question 13

Projecting over and in contact with the spiral organ are ________, which are covered by the tectorial membrane. They cells synapse with sensory neurons in the cochlear branch of the vestibulocochlear nerve.

Answer 13

hair cells