What are the Roles of Largest Groups of Mammals
Mammals are air-breathing vertebrate animals that came, from the mammary glands that are functions in mothers with young. The word “mammal” is from the scientific name Mammalia derived from the Latin word mamma. There are about 5,000 species of living mammals. Unlike other class of animals, mammals have hairs in the body, have 3 middle ear bones, and they nourish their young with milk. All female mammals nurse their young born with their own milk, who lay from its sweet glands called the mammary glands. They feed their young born and stay with them until they develop well. They protect their young even if, it can cause their life. The largest Groups of Mammals are the placental group. Placental is a class of mammal who carry their young inside their body. This include the whales, dogs, cats, rats, deer, sheep’s, bears, seals, rabbits and even us the human species can be called as mammals.
There are other mammals that they call the marsupial. This class of mammal carried and nourishes the young’s in a pouch like the kangaroo and monkey. They protect them and teach them until the time to come that they are grown and ready to get out of the pouch. Only that human species are the highest group of mammals that live on earth. Most of the mammals possess specialized teeth. Human species are a bit different from the other mammals because they have the higher class of brain. There thinking ability is not like other animals. Not all animals can be part of the group of mammals. Only those animals that have a strong connection with their young can be class as mammals. Reptiles and birds are sometimes referred as a mammal like, but they are not mammals. In short that animal who lays egg is not a mammal.