Mammals

Author: Huaiyi
Publisher:
Publish Date: 1999-04-01
Features: What are mammals? Mammals, also known as "animals," include over 3,500 species worldwide. All mammals have a backbone, and they also share the following characteristics. Humans are also mammals. Mammals are warm-blooded animals. Regardless of whether their surroundings are cold or hot, their bodies maintain a constant temperature, allowing them to move around in any weather. Mammals take care of their young, with female mammals secreting milk to feed their offspring. Mammals are covered in fur.