Humans normally maintain a constant internal body temperature of 98.6°F and are referred to as “warm-blooded.” Except in hot weather, reptiles are normally cold to the touch and are often referred to as “cold-blooded.” What does this mean?
Reptiles

adjust their body temperature to the air temperature

Explanation

Reptiles and other so-called “cold-blooded” animals adjust their internal body temperature up with rising air temperatures and down with falling air temperatures.

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