Here's why:

* Internal Temperature Regulation: Warm-blooded animals, like humans, can maintain a stable internal body temperature regardless of the external environment. This is achieved through internal mechanisms like shivering when cold and sweating when hot.

* Metabolic Heat Production: Our bodies generate heat through metabolism, primarily by breaking down food.

* Constant Body Temperature: Unlike cold-blooded animals, our body temperature remains relatively constant, usually around 98.6°F (37°C).

Cold-blooded animals (ectotherms) rely on external sources of heat like the sun to regulate their body temperature. They are often sluggish in the cold and become more active in warmer temperatures.

So, while we may get chilly in the winter, we are definitely not cold-blooded!