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The rat's ear is an organ of hearing and equilibrium. It is made up of the outer or external ear, the middle ear, and the inner ear.

The outer or external ear is composed of the concha auriclae (or pinna), seen as the large outer flap of the ear, and the auditory canal.

The middle ear is composed of the tympanic cavity (housing the ossicles: the malleus, the incus, and the stapes), the tympanic membrane (composed of squamous epithelium), and the nearly horizontal Eustachian tube.

The inner ear is composed of the labyrinth (concerned with equilibrium) and the cochlea (containing nerves that transmit sound to the brain).

Sebaceous glands called Zymbal's Glands are found at the base of each ear and consist of stratified squamous epithelium. These glands open into the auditory canal of the external ear.

Degenerative changes that occur to the ear through aging, infection, or tumors can affect both the sense of balance and hearing.

Auricle / Ear


The Rat Guide and its affiliates accept no responsibility for misuse or misunderstanding of its information. This guide in whole or part, exists solely for the purpose of recognizing and understanding the care and illnesses in the pet rat. Please seek advice and treatment from a qualified Veterinarian if your rat is ill.

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