Human Ear Model, 5 Parts, Superior

Quick Answer: The 5 part ear model is an enlarged replica of the human ear that separates into five pieces, listed as a superior grade within the range. With more removable parts than a basic ear model, it suits detailed lessons on the ossicles, the cochlea and the vestibular system that controls balance.

Balance Organs and Finer Detail

More parts usually mean the smaller structures can be lifted out and turned over. On a five-piece ear, students can typically examine the eardrum and ossicles separately and open the bony labyrinth to see inside the cochlea and vestibule. Which five pieces this model separates into is not given in the title, and ‘Superior’ reads as a quality grade within the range rather than a part of the ear.

The model suits teaching of the vestibular system. The three semicircular canals, set at right angles, each end in a swelling called the ampulla, where hair cells in a jelly-like cupula bend when head rotation moves the fluid. The utricle and saccule contain otoliths, tiny crystals of calcium carbonate that respond to gravity and straight-line acceleration. Their signals travel in the vestibular nerve, which joins the cochlear nerve as the vestibulocochlear nerve.

These structures explain experiences students recognise: dizziness after spinning, when the canal fluid keeps moving after the body stops; motion sickness, when the eyes and inner ear disagree; and the brief spinning spells of positional vertigo, when displaced otoliths drift into a canal. Tracing the nerve through the internal acoustic meatus to the brainstem links the model to neuroanatomy.

Applications

• College and nursing lessons on the vestibular system and balance
• Explaining vertigo, motion sickness and dizziness after spinning
• Detailed study of the ossicles and cochlea for audiology and ENT teaching
• Revision for anatomy practicals in which each removable part is named

Specifications

Care & Handling

• Lay out the pieces of the 5 part ear model on a tray in the order they came out.
• Handle the inner-ear piece by its bony block rather than the thin canals.
• Check that all five parts are present before the model goes back in its box.

Why Choose LabEquip

Nursing, audiology and medical colleges usually pick a five-piece ear when they teach balance as well as hearing. LabEquip offers it among its anatomy models alongside the simpler 3 part ear model for school classes; details on the parts can be requested through the contact page.

Frequently Asked Questions

How do the semicircular canals detect head movement?

Each canal is filled with fluid. When the head turns, the fluid lags behind and bends a jelly-like cupula in the ampulla, stimulating hair cells. The three canals lie at right angles, so rotation in any direction is detected.

What are otoliths?

They are tiny crystals of calcium carbonate resting on a gel layer over hair cells in the utricle and saccule. Because they are heavier than the surrounding fluid, they shift with gravity and acceleration, telling the brain which way the head is tilted.

Why do people feel dizzy after spinning?

During a long spin the canal fluid catches up with the head. When the spinning stops the fluid keeps moving for a few seconds, so the canals signal rotation that is no longer happening and the body feels as if it is still turning.

What causes motion sickness?

It arises when the balance organs and the eyes send conflicting information, for example when reading in a moving car. The inner ear detects motion but the eyes see a still page, and the mismatch can cause nausea.

How is the five-part model different from the three-part model?

Both show the three regions of the ear. The five-part model separates into more pieces, so smaller structures such as the ossicles and inner ear can be studied individually, which suits more detailed college work.

Which nerve carries hearing and balance signals?

The vestibulocochlear nerve, cranial nerve VIII. Its cochlear part carries sound information and its vestibular part carries balance information. It leaves the inner ear through the internal acoustic meatus and enters the brainstem between the pons and medulla.

Last Updated: September 2026