Changes

In many lizards gas exchange occurs in the cranial part of the lung, while the caudal portion of the lung is analagous to the avian air sac.

In many lizards gas exchange occurs in the cranial part of the lung, while the caudal portion of the lung is analagous to the avian air sac.

The glottis is generally quite rostral and located at the base of the tongue. It is normally closed except during respiration. This simplifies intubation and tube-feeding.

The hard palate is reduced to allow airflow from the inner nasal opening to the '''glotttis'''. The glottis is generally quite rostral and located at the base of the tongue. It is normally closed except during respiration. This simplifies intubation and tube-feeding.