Changes

== Heat ==

== Heat ==

Reptiles are ectothermic vertebrates that regulate body temperature by behavioural and physiological processes. Most species operate within a '''preferred optimum temperature zone''' (POTZ) that, in the wild, shows seasonal variation. Knowing the POTZ is imperative for long-term captive maintenance since supplemental heating is necessary for captive lizards. Reaching their POTZ is necessary for optimum metabolic processes including digestion, growth, healing, reproduction and immune system function.

Reptiles are ectothermic vertebrates that regulate body temperature by behavioural and physiological processes. Most species operate within a [[Preferred Optimum Temperature Zone|'''preferred optimum temperature zone''']] (or POTZ) that, in the wild, shows seasonal variation. Knowing the POTZ is imperative for long-term captive maintenance since supplemental heating is necessary for captive lizards. Reaching their POTZ is necessary for optimum metabolic processes including digestion, growth, healing, reproduction and immune system function.

Most lizard species, such as iguanas, derive external heat from basking in the sun, not from laying on rocks heated by the sun. Exposure to temperatures above the POTZ can result in localised burns, systemic effects and death. The most popular heat source, the hot rock, is therefore INAPPROPRIATE for many species and may be dangerous.

Most lizard species, such as iguanas, derive external heat from basking in the sun, not from laying on rocks heated by the sun. Exposure to temperatures above the POTZ can result in localised burns, systemic effects and death. The most popular heat source, the hot rock, is therefore INAPPROPRIATE for many species and may be dangerous.