structures of the ear. Flashcards

1
Q

The ear consists of three anatomical subdivisions:

A

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

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2
Q

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

A

The external ear

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3
Q

What part of the external ear?

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

A

Auricle

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4
Q

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).

A

External auditory canal

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5
Q

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.

A

Tympanic membrane

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6
Q

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

A

Middle ear

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7
Q

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

A

1) Malleus
2) Incus
3) Stapes

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8
Q

_______ 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.

A

The internal ear

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9
Q

_________ 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.

A

The bony labyrinth

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10
Q

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

A

The membranous labyrinth

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11
Q

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

A

The vestibule

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12
Q

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.

A

cochlea,

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13
Q

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.

A

hair cells

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