Question

Bony labyrinth is filled with a fluid called

• A. endolymph
• B. perilymph
• C. hololymph
• D. juxtalymph.

Answer 1

Answer: (A)

endolymph

The internal ear is a delicate, irregular organ called membranous labyrinth. It is surrounded by an almost similarly shaped bony labyrinth. The membranous labyrinth is joined to the bony labyrinth at certain points, but its greater part is separated from the bony labyrinth by a narrow perilymphatic space. This space contains a watery fluid called perilymph which closely resembles cerebrospinal fluid in composition, The membranous labyrinth is itself filled with another fluid, the endolymph.

So, the correct answer is 'Endolymph'.