Columella

Definition

The columella is a small bone in the middle ear of birds that transmits sound vibrations from the eardrum to the inner ear. It is homologous to the stapes bone found in mammals and reptiles.

5 Must Know Facts For Your Next Test

1. The columella plays a crucial role in hearing by transmitting sound vibrations to the inner ear.
2. It is derived from the hyomandibular bone of fish during evolution.
3. The columella is surrounded by air-filled spaces, enhancing its ability to transmit sound.
4. Birds have only one ossicle (the columella) compared to three in mammals.
5. Damage to the columella can result in partial or complete hearing loss in birds.

Related terms

Tympanic Membrane: A membrane that receives sound vibrations and transmits them to the middle ear.

Inner Ear: The part of the ear responsible for converting sound waves into neural signals for hearing.

Stapes: One of three auditory ossicles in mammals, homologous to the columella in birds.