"Big Ear" Foldable
12. Oval Window
A flexible membrane covered opening at the upper part of the cochlea called the vestibule. The stapes of the middle ear vibrates against this which transmits the vibrations within the fluid contained in the cochlea.
9. Cochlea
The chamber of the cochlea is bony and conical and it tapers off into a coiled structure. The Organ of Corti is the sensory component inside the cochlea and it is located within the coiled portion.
5. Tympanic Cavity
The space within which the ossicles are located. It connects to the Eustachian tube, but is separated from the auditory canal by the tympanic membrane.
7. Cochlear Nerve
Collects sensory information from the cochlea (specifically the Organ of Corti) and sends it to the brain.
6. Vestibular Nerve
Collects sensory information from the semicircular canals and sends it to the brain.
8. Semicircular Canals
These three interconnected fluid filled canals in the inner ear contain sensory receptors that send information to the brain that helps you maintain your balance.
2. Malleus/Hammer
This first small bone (ossicle) of the middle ear transmits the vibrations from the tympanic membrane to the second bone, the incus.
1. Tympanic Membrane (Eardrum)
This is a cone-shaped membrane that converts sound waves into vibrations which it passes along to the ossicles of the inner ear. This process also results in amplifying the sound wave signals over twenty times before the signal reaches the oval window of the cochlea.
14. Auricle/Pinna
This is the outer flap of the ear. It is shaped by rigid but flexible cartilage covered in skin. Its shape helps funnel sound waves towards the auditory canal.
13. External Acoustic Meatus/Auditory Canal
This is the pathway that directs sound waves to the middle ear (the eardrum specifically).
11. Round Window
This membrane covered opening located below the oval window allows the fluid in the cochlea to be displaced when the oval window is pushed inward by the stapes.
3. Incus/Anvil
This second small bone (ossicle) of the middle ear transmits the vibrations of the malleus to the third bone, the stapes.
4. Stapes/Stirrup
This third and smallest bone (ossicle) of the middle ear transmits the vibrations from the incus to the oval window of the cochlea to which it is attached. This bone is also the smallest bone in the human body. When it taps against the oval window, this displaces the fluid found within the cochlea.
10. Eustachian Tube/Auditory Tube/Pharyngotympanic Tube
This tube connects the middle ear (tympanic cavity) to the nasopharynx. This helps drain mucus from the middle ear. It can also be used to help equalize the pressure of the inner ear when external air pressure changes.
