fenestra ovalis

This runs directly from the eardrum to the fenestra ovalis.

The stapes transmits the sound vibrations from the incus to the membrane of the inner ear inside the fenestra ovalis.

Paired prootic and opisthotic bones above each fenestra ovalis, fused to the petrous part of the temporal bones in mammals.

The stapes is the stirrup-shaped small bone or ossicle in the middle ear which is attached through the incudostapedial joint to the incus laterally and to the fenestra ovalis, the "oval window", medially.

The stapes (stirrup) connects with the incus and is attached to the membrane of the fenestra ovalis, the elliptical or oval window or opening between the middle ear and the inner ear.

The otic capsule is allegedly organized in avian fashion, with three distinct foramina arranged as such: fenestra ovalis, fenestra pseudorotunda, and the caudal tympanic recess, with a bony metotic strut positioned between the fenestra pseudorotunda and caudal tympanic recess.