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The teeth are generally '''pleurodont''' but in some families, such as agamas and chameleons, they are '''acrodont'''. The teeth of the venomous Gila monster and the Mexican beaded lizard are grooved to allow the flow of venom.

 

Lizards have moveable lips composed of flexible skin. The teeth are generally '''pleurodont''' (attached to the sides of the mandible without sockets) but in some families, such as agamas (Agamidae) and chameleons (Chamaeleonidae), they are '''acrodont''' (attached to the biting edges of the jaws without sockets). The teeth of the venomous Gila monster and the Mexican beaded lizard are grooved to allow the flow of venom.

The tongue is generally mobile and protrusible. In the green iguana, the tip is darker than the rest and could be mistaken for a lesion.

The tongue is generally mobile and protrusible. In the green iguana, the tip is darker than the rest and could be mistaken for a lesion.

A cloaca is present and is divided into coprodeum (collects faeces), ureodeum (collects urinary wastage) and proctodeum (final chamber prior to elimination)

A cloaca is present and is divided into coprodeum (collects faeces), ureodeum (collects urinary wastage) and proctodeum (final chamber prior to elimination)