Answer
The spiral organ ( Organ of Corti) is located between the tectorial membrane and the basilar membrane in the cochlear canal/duct of the inner ear.
Work Step by Step
The ear ossicle are located between the tympanic membrane and the oval window.
The eustachian tube. connects the middle ear and the the nasopharynx including the throat.
Macula sacculi and macula utriculi are receptors in the inner ear that respond to the pull of gravity.