Model of human ear, 18th century, cased

The ivory model of the ear can be taken apart to show the internal structure. The three small bones in the middle ear transmit sound from the outer ear through the ear drum. These three bones are named (from left to right) the malleus, the incus and the stapes. The vibrations of sound are transmitted through each of these bones in turn from the ear drum to the inner ear, which contains the cochlea. The hairs of the bones in the inner ear send a nerve impulse to the brain.

This would have been used as a teaching aid to help illustrate the anatomy of the ear to medical students.