The organ of Corti is located in the:

$.....P.....$ ends at the oval window,while $.....Q.....$ ends at the round window,which opens to the middle ear.
$\quad\quad\quad P\quad\quad \quad Q$

The $Scala$ $media$ is a part of:

The basilar membrane separates .......... .

In the mammalian ear,the membranous structure that separates the $scala$ $vestibuli$ and $scala$ $media$ is:

Otoliths are $CaCO_3$ particles found in the.....