18.
The middle ear contains air and:
a. Three small bones.
b. Organ of Corti.
c.
Labyrinth.
d. Fluid.
19.
The ear is made up of the external ear, the inner ear, and the:
a. Tympanic membrane.
b. Temporal bone.
c.
Middle ear.
d. Labrinth.
20.
Otological surgery involves the:
a. Eye.
b. Ear.
c.
Nose.
d. Throat.
21.
What incision may be used for surgery of the mastoid process?
a. Endaural.
b. Vertical.
c.
Postaural.
d. Circumferential.
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