Question

activity 17 : quiz
module : nervous
topic : structures / type : combination

what structure is highlighted?

a. incus
b. malleus
c. stapes
d. temporal bone
e. tympanic cavity (middle ear)

Explanation:

Identify the highlighted structure

Using the Auditory Ossicles and Middle Ear Anatomy knowledge points
The anatomical diagram shows a cross-section of the human ear, focusing on the external, middle, and inner ear structures. In the middle ear cavity, one of the three auditory ossicles is highlighted in green.

Analyze the highlighted bone

Using the Incus Articulations knowledge point
The three auditory ossicles are the malleus (hammer), incus (anvil), and stapes (stirrup):

• The malleus is attached directly to the tympanic membrane (eardrum).
• The stapes is the innermost ossicle, fitting into the oval window of the inner ear.
• The incus is the middle bone, situated between and articulating with both the malleus and the stapes.

In the provided image, the highlighted green structure is the middle ossicle, which is the incus.

Answer:

• A. Incus (Correct answer)
• B. Malleus
• C. Stapes
• D. Temporal bone
• E. Tympanic cavity (middle ear)