Mammals include vertebrates that feed their babies with breast milk. Another distinctive feature of mammals is live birth, which ensures the safety of offspring in any conditions.
These and other features explain why humans are mammals. The human brain, like the brain of all mammals, is complex: the presence of a large number of convolutions contributes to a variety in behavior.
Common signs of mammals
Binocular vision
Mammals have binocular vision: that is, they look in one direction with two eyes. Such vision is not peculiar, for example, to birds looking with each eye separately. Breathing with the lungs, as well as a heart with four chambers, also explain why humans are mammals. This distinctive anatomical feature is common to all vertebrates.
Hairline
Many members of the mammalian class have a hairline that maintains a stable body temperature of about 30 degrees. Such species are called warm-blooded. Hippos and whales are the exception to the rule, as is the person who covers his body with clothing to maintain temperature.
Mammals are an interesting class with a variety of species. Some of the mammals fly, and there are mammals that live underground. Representatives of the class are not alike.
Mammals are divided into 30 orders, 20 of which exist now, and 10 orders are extinct. Hominids are a squad of primates, to which modern man belongs. Neanderthals and Pithecanthropus also belong to the hominid family.
