Humans are warm-blooded or endothermal animals who can maintain a more or less constant body temperature, irrespective of the surrounding temperature.
- Warm-blooded means we can regulate our internal body temperature, independent of the environment, while cold-blooded animals are subject to their surroundings’ temperature.
- Endotherms use internally generated heat to maintain body temperature. Their body temperature tends to stay steady regardless of the environment.
- Ectotherms depend mainly on external heat sources and their body temperature changes with the temperature of the environment.
- Humans belong to the animal phylum known as chordates because we have a backbone. The human-animal has hair and milk glands, so we are placed in the class of mammals.