Mammals
The class Mammalia is one of the 7 which make up the subphyla Vertebrata (phylum Chordata). Mammals are vertebrates which are characterised by having young that are suckled on milk from the female parent, hair, and are endothermic.
The class Mammalia is one of the 7 which make up the subphyla Vertebrata (phylum Chordata). Mammals are vertebrates which are characterised by having young that are suckled on milk from the female parent, hair, and are endothermic.