![]() ![]() Cells are like tiny machines that make chemicals for energy and growth. Scientists no longer use these terms because they don’t adequately describe the variations in temperature control found in nature.Įndotherms are animals that keep their body temperature stable as a result of their metabolism, a word for the chemical activity in their cells. ![]() So while cold-blooded animals did not always have “cold” blood, their body temperature could vary dramatically depending on the environment. Cold-blooded animals, such as reptiles, amphibians, insects, arachnids and fish, were not. Warm-blooded animals, such as mammals and birds, were able to maintain their body temperature regardless of the surroundings. When I was a kid, I was taught that the animal kingdom could be divided into two groups. ![]()
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