Class Mammalia (Mammals)


Order Afrosoricida Afrosoricida	Order Artiodactyla Antelope, Giraffe & Pigs
Order Carnivora Carnivores	Order Cetacea Whales, Dolphins & Porpoises
Order Chiroptera Bats	Order Cimolesta Cimolesta
Order Cingulata Cingulata	Order Dasyuromorphia Australasian carnivorous marsupials
Order Dermoptera Flying Lemurs	Order Didelphimorphia Didelphimorphia
Order Diprotodontia Diprotodontia	Order Edentata Anteaters, Armadillos & Sloths
Order Erinaceomorpha Erinaceomorpha	Order Eulipotyphla Eulipotyphla
Order Hyracoidea Hyraxes	Order Insectivora Insectivores
Order Lagomorpha Rabbits & Pikas	Order Lipotyphla Lipotyphla
Order Macroscelidea Elephant Shrews	Order Marsupialia Marsupials
Order Microbiotheria Microbiotheria	Order Monotremata Platypus & Echidnas
Order Notoryctemorphia Notoryctemorphia	Order Paucituberculata Paucituberculata
Order Peramelemorphia Peramelemorphia	Order Perissodactyla Horses, Rhinos & Tapirs
Order Pholidota Pangolins	Order Pilosa Pilosa
Order Primates Primates	Order Proboscidea Elephants
Order Rodentia Rodents	Order Scandentia Tree Shrews
Order Sirenia Dugongs & Manatees	Order Tubulidentata Aardvarks

There are about 4500 living species of class Mammalia, to which we belong. Mammals are homeotherms (warm-blooded), with some species better at it than others. They have a four-chambered heart with complete double circulation; that is, the aerated blood of the arteries does not mix with the oxygen-depleted blood of the veins. The skin of most mammals is covered with hair at some stage of life. Mammals nourish their young with milk secretions produced in mammary glands of the mother. The fertilized egg develops inside the female; in most mammals, a special organ, the placenta, nourishes the developing embryo. Mammals have complex and differentiated teeth.