Question
Biology Question on Structural Organisation of Animals and plants
In frog, 'fenestra ovalis' is
A
the communication between the pharynx and the tympanic cavity
B
the external opening of the tympanic cavity which is covered by the tympanic membrane
C
the air filled cavity of the middle ear
D
the opening in the auditory capsule which separates the middle ear from the internal ear.
Answer
the opening in the auditory capsule which separates the middle ear from the internal ear.
Explanation
Solution
The bony partition between tympanic cavity (cavity of middle ear) and auditory capsule (internal ear) is perforated by a small window-like oval aperture, the fenestra ovalis, which remains closed by a membrane and a cartilaginous nodule, the stapedial plate.