Question

what structure is highlighted?

a. basilar membrane
b. nerve fibers of cochlea
c. stria vascularis
d. scala vestibuli
e. scala tympani

Explanation:

Identify the histological section

Using the Cochlea Histology and Cochlea Histology Identification knowledge points
The image shows a cross-section of the bony cochlea, displaying multiple turns of the cochlear duct (scala media), scala vestibuli, and scala tympani.

Analyze the highlighted regions

Using the Cochlea Histology and Cochlea Histology Identification knowledge points
The highlighted regions (colored in green) are located on the outer wall of the cochlear duct (scala media). This specialized, highly vascularized pseudostratified epithelium is responsible for producing endolymph.

Match with the correct anatomical structure

Using the Cochlea Histology and Cochlea Histology Identification knowledge points
The vascularized tissue lining the outer wall of the cochlear duct is the stria vascularis, which corresponds to option C.

Answer:

• (A) Basilar membrane
• (B) Nerve fibers of cochlea
• (C) Stria vascularis (Correct answer)
• (D) Scala vestibuli
• (E) Scala tympani