The middle ear contains the:
a. cerumen and sebaceous glands.
b. umbo and malleus.
c. vestibule and cochlea.
d. pars tensa and semicircular canals.
B
The middle ear contains the ossicles, three small bones—the malleus (umbo is part of the malleus), the incus, and the stapes. Cerumen and sebaceous glands lie outside the middle ear. The vestibule and the cochlea lie in the inner ear. The tympanic membrane separates the external ear from the middle ear and is composed of the pars tensa, and the semicircular canals lie in the inner ear.
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