What Class Do Humans Belong To?

Humans belong to the class known as Mammalia of the Animalia, or animal, kingdom. Members of the Mammalian class are often called mammals. They have spines and hair - except for whales older than fetuses - and in natural circumstances, they feed their offspring milk from maternal mammary glands.

Unlike other classes of vertebrates, the red blood cells of mammals do not have a nucleus, and their lower jaw bones are attached directly to the skull instead of to a connecting bone. The babies of mammals develop in a mother's womb until birth, with the exception of the duck-billed platypus and a few other egg-layers.