Description

The term “mammal” has never gained popular acceptance, and many people do not know what a mammal really is nor how it differs from other living things. If we were to say that a mammal is what most people would simply call an “animal,” no further explanation would be necessary. Unfortunately, biologists apply the term “animal” to all living things except plants. This term, therefore, is also correctly applied to birds, amphibians, reptiles, fish,  insects, worms, and protozoans, to name only a few.