An animal belongs to the mammals if the animal’s children are suckled. The baby animal sucks on the mother’s teat to drink milk. This is how it is fed. Humans are also mammals.
In mammals, a male mates with a female. Then the young begin to grow in the abdomen of the female. The mother gives birth to these as they live young, not in eggs. However, there are a few mammals that lay eggs. The platypus is one of these exceptions.
Here is an overview of all Klexikon articles about mammals.
What else do mammals have in common?
Mammals are a class of animals. Along with fish, birds, reptiles, and amphibians, they are vertebrates. So you have a spine in your back.
Mammals have the most complicated hearts of all living things. It has four chambers. On the one hand, the double blood circulation leads through the lungs to take in fresh oxygen and release carbon dioxide. On the other hand, the cycle leads through the rest of the body. The blood carries oxygen and food throughout the body and takes the waste with it. Birds have the same kind of hearts.
Mammals are the only ones with a diaphragm. This large muscle lies between the abdomen and chest, separating the two.
Most mammals have fur, i.e. skin with hair. Your body has its own temperature, which always remains the same. So a mammal is not simply as warm or cold as its surroundings.
Mammals include not only dogs, cats, horses, rabbits, and mice, but also whales and dolphins. They also give birth to live young animals. They suckle milk from their mother. Whales and dolphins don’t have fur, but they do have smooth skin.