Changes

==Anatomy==

==Anatomy==

The ear has auditory and vestibular functions. In many lizards the external ear is greatly reduced and most species have a superficial tympanum. Exceptions include geckos and monitors which have external ear canals.

The lizard ear has auditory and vestibular functions. In many lizards the external ear is greatly reduced and most species have a superficial tympanum. Exceptions include geckos and monitors which have external ear canals. Iguanids have a tympanic membrane which is nearly contiguous to the surface of the skin whereas it is deeper and recessed in scincids (such as the blue-tongue skink) and agamids (such as the bearded dragon).

There is a single ossicle, the columella. Middle and inner ears and eustachian tubes are present.

There is a single ossicle, the columella. Middle and inner ears and eustachian tubes are present.