Mammals are one of the six main classes of animals in this world and humans too are mammals. How to distinguish mammals? Firstly, mammals have mammary glands that produce milk for feeding their babies and that’s also the reason why they are called mammals. Secondly, mammals are warm-blooded animals which can make and regulate their own body heat. Besides, mammals have a covering of hair or fur, a lung to breathe air, and most importantly, a unique brain that makes them the most intelligent class of animals. Connect to the MMIS to find out more.