Editing Age Of Dragons: Biology (section)

===Internal Physiology===
<br>Dragons appear reptilian, but have only some reptilian traits. Though they have scales and are hairless, they are warm blooded capable of maintaining their body temperatures in a wide range of environments. Dragons require food to survive (a strictly carnivorous diet), need to drink water to stave off thirst, and must sleep regularly to fight tiredness. They are able to contract diseases and suffer other infirmities, but due to their stronger constitutions tend to be vulnerable only to the most potent of infections.

The most curious property of a dragon's physiology is complete immunity to fire and heat. A dragon can be exposed to the flames of a raging blast furnace, and neither feel pain nor come to harm. In fact, extreme heat is a somewhat pleasant sensation for dragons, and courting rituals will often begin with mutual dousing in fire-breath.
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